72411731 has 8 divisors (see below), whose sum is σ = 82821984. Its totient is φ = 62017920.

The previous prime is 72411709. The next prime is 72411739. The reversal of 72411731 is 13711427.

It is a happy number.

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 72411731 - 2¹⁸ = 72149587 is a prime.

It is a super-2 number, since 2×72411731² = 10486917572832722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72411731.

It is not an unprimeable number, because it can be changed into a prime (72411739) 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, 7541 + ... + 14201.

It is an arithmetic number, because the mean of its divisors is an integer number (10352748).

Almost surely, 2^72411731 is an apocalyptic number.

72411731 is a deficient number, since it is larger than the sum of its proper divisors (10410253).

72411731 is a wasteful number, since it uses less digits than its factorization.

72411731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8221.

The product of its digits is 1176, while the sum is 26.

The square root of 72411731 is about 8509.5082701646. The cubic root of 72411731 is about 416.8082531802.

The spelling of 72411731 in words is "seventy-two million, four hundred eleven thousand, seven hundred thirty-one".