72357231 has 8 divisors (see below), whose sum is σ = 97124400. Its totient is φ = 47914112.

The previous prime is 72357227. The next prime is 72357269. The reversal of 72357231 is 13275327.

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 72357231 - 2² = 72357227 is a prime.

It is a super-2 number, since 2×72357231² = 10471137755974722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72357211) 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, 80490 + ... + 81383.

It is an arithmetic number, because the mean of its divisors is an integer number (12140550).

Almost surely, 2^72357231 is an apocalyptic number.

72357231 is a deficient number, since it is larger than the sum of its proper divisors (24767169).

72357231 is a wasteful number, since it uses less digits than its factorization.

72357231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162025.

The product of its digits is 8820, while the sum is 30.

The square root of 72357231 is about 8506.3053671967. The cubic root of 72357231 is about 416.7036580136.

The spelling of 72357231 in words is "seventy-two million, three hundred fifty-seven thousand, two hundred thirty-one".