72655031 has 8 divisors (see below), whose sum is σ = 76560000. Its totient is φ = 68758200.

The previous prime is 72655021. The next prime is 72655039. The reversal of 72655031 is 13055627.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72655031 is a prime.

It is a super-2 number, since 2×72655031² = 10557507059221922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72654985 and 72655003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72655039) 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, 27206 + ... + 29756.

It is an arithmetic number, because the mean of its divisors is an integer number (9570000).

Almost surely, 2^72655031 is an apocalyptic number.

72655031 is a deficient number, since it is larger than the sum of its proper divisors (3904969).

72655031 is a wasteful number, since it uses less digits than its factorization.

72655031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 72655031 is about 8523.7920551830. The cubic root of 72655031 is about 417.2745500133.

The spelling of 72655031 in words is "seventy-two million, six hundred fifty-five thousand, thirty-one".