75729231 has 12 divisors (see below), whose sum is σ = 115144120. Its totient is φ = 47828880.

The previous prime is 75729223. The next prime is 75729253. The reversal of 75729231 is 13292757.

It is not a de Polignac number, because 75729231 - 2³ = 75729223 is a prime.

It is a super-2 number, since 2×75729231² = 11469832855702722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75729221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221260 + ... + 221601.

Almost surely, 2^75729231 is an apocalyptic number.

75729231 is a deficient number, since it is larger than the sum of its proper divisors (39414889).

75729231 is a wasteful number, since it uses less digits than its factorization.

75729231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442886 (or 442883 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 75729231 is about 8702.2543630947. The cubic root of 75729231 is about 423.0787204899.

The spelling of 75729231 in words is "seventy-five million, seven hundred twenty-nine thousand, two hundred thirty-one".