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253915039 = 7291250813
BaseRepresentation
bin11110010001001…
…10111110011111
3122200210012221201
433020212332133
51010000240124
641110140331
76202146040
oct1710467637
9580705851
10253915039
11120368144
12710516a7
13407b36b1
1425a188c7
1517459144
hexf226f9f

253915039 has 8 divisors (see below), whose sum is σ = 300195360. Its totient is φ = 210136416.

The previous prime is 253915033. The next prime is 253915093. The reversal of 253915039 is 930519352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253915039 - 25 = 253915007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253914989 and 253915007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253915033) 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, 625204 + ... + 625609.

It is an arithmetic number, because the mean of its divisors is an integer number (37524420).

Almost surely, 2253915039 is an apocalyptic number.

253915039 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

253915039 is a deficient number, since it is larger than the sum of its proper divisors (46280321).

253915039 is a wasteful number, since it uses less digits than its factorization.

253915039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250849.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 253915039 is about 15934.7117639448. The cubic root of 253915039 is about 633.2319336894.

It can be divided in two parts, 2539 and 15039, that added together give a triangular number (17578 = T187).

The spelling of 253915039 in words is "two hundred fifty-three million, nine hundred fifteen thousand, thirty-nine".

Divisors: 1 7 29 203 1250813 8755691 36273577 253915039