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23025431 = 1113161017
BaseRepresentation
bin101011111010…
…1011100010111
31121022210221202
41113311130113
521343303211
62141303115
7366466352
oct127653427
947283852
1023025431
1111aa7390
127864a9b
134a02520
1430b5299
15204c53b
hex15f5717

23025431 has 8 divisors (see below), whose sum is σ = 27051024. Its totient is φ = 19321920.

The previous prime is 23025427. The next prime is 23025451. The reversal of 23025431 is 13452032.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23025431 - 22 = 23025427 is a prime.

It is a super-2 number, since 2×230254312 = 1060340945471522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23025451) 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, 80366 + ... + 80651.

It is an arithmetic number, because the mean of its divisors is an integer number (3381378).

Almost surely, 223025431 is an apocalyptic number.

23025431 is a deficient number, since it is larger than the sum of its proper divisors (4025593).

23025431 is a wasteful number, since it uses less digits than its factorization.

23025431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161041.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 23025431 is about 4798.4821558489. The cubic root of 23025431 is about 284.4914744229.

Adding to 23025431 its reverse (13452032), we get a palindrome (36477463).

The spelling of 23025431 in words is "twenty-three million, twenty-five thousand, four hundred thirty-one".

Divisors: 1 11 13 143 161017 1771187 2093221 23025431