75285231 has 32 divisors (see below), whose sum is σ = 122135040. Its totient is φ = 40267776.

The previous prime is 75285193. The next prime is 75285253. The reversal of 75285231 is 13258257.

It is not a de Polignac number, because 75285231 - 2⁶ = 75285167 is a prime.

It is a super-2 number, since 2×75285231² = 11335732013446722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75285192 and 75285201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75285031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80575 + ... + 81503.

It is an arithmetic number, because the mean of its divisors is an integer number (3816720).

Almost surely, 2^75285231 is an apocalyptic number.

75285231 is a deficient number, since it is larger than the sum of its proper divisors (46849809).

75285231 is a wasteful number, since it uses less digits than its factorization.

75285231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183.

The product of its digits is 16800, while the sum is 33.

The square root of 75285231 is about 8676.7062299008. The cubic root of 75285231 is about 422.2502633449.

The spelling of 75285231 in words is "seventy-five million, two hundred eighty-five thousand, two hundred thirty-one".