232128975 has 24 divisors (see below), whose sum is σ = 413310352. Its totient is φ = 114278400.

The previous prime is 232128943. The next prime is 232128979. The reversal of 232128975 is 579821232.

It is not a de Polignac number, because 232128975 - 2⁵ = 232128943 is a prime.

It is a super-2 number, since 2×232128975² = 107767722069101250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232128979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118066 + ... + 120015.

Almost surely, 2^232128975 is an apocalyptic number.

232128975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

232128975 is a deficient number, since it is larger than the sum of its proper divisors (181181377).

232128975 is a wasteful number, since it uses less digits than its factorization.

232128975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238107 (or 238102 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 232128975 is about 15235.7794352636. The cubic root of 232128975 is about 614.5772095786.

The spelling of 232128975 in words is "two hundred thirty-two million, one hundred twenty-eight thousand, nine hundred seventy-five".