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253106020 = 225103122867
BaseRepresentation
bin11110001011000…
…01011101100100
3122122021010012001
433011201131210
51004243343040
641040535044
76162236266
oct1705413544
9578233161
10253106020
1111a965332
1270921484
134058c39b
1425887b36
151734959a
hexf161764

253106020 has 24 divisors (see below), whose sum is σ = 536687424. Its totient is φ = 100258656.

The previous prime is 253106003. The next prime is 253106023. The reversal of 253106020 is 20601352.

It is a happy number.

253106020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (253106023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59374 + ... + 63493.

It is an arithmetic number, because the mean of its divisors is an integer number (22361976).

Almost surely, 2253106020 is an apocalyptic number.

253106020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253106020 is an abundant number, since it is smaller than the sum of its proper divisors (283581404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253106020 is a wasteful number, since it uses less digits than its factorization.

253106020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122979 (or 122977 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 253106020 is about 15909.3060816618. The cubic root of 253106020 is about 632.5586878631.

Adding to 253106020 its reverse (20601352), we get a palindrome (273707372).

The spelling of 253106020 in words is "two hundred fifty-three million, one hundred six thousand, twenty".

Divisors: 1 2 4 5 10 20 103 206 412 515 1030 2060 122867 245734 491468 614335 1228670 2457340 12655301 25310602 50621204 63276505 126553010 253106020