72730131 has 8 divisors (see below), whose sum is σ = 102677904. Its totient is φ = 45634560.

The previous prime is 72730127. The next prime is 72730139. The reversal of 72730131 is 13103727.

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

It is not a de Polignac number, because 72730131 - 2² = 72730127 is a prime.

It is a super-2 number, since 2×72730131² = 10579343910554322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72730139) 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, 712990 + ... + 713091.

It is an arithmetic number, because the mean of its divisors is an integer number (12834738).

Almost surely, 2^72730131 is an apocalyptic number.

72730131 is a deficient number, since it is larger than the sum of its proper divisors (29947773).

72730131 is a wasteful number, since it uses less digits than its factorization.

72730131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426101.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 72730131 is about 8528.1962336710. The cubic root of 72730131 is about 417.4182726947.

Adding to 72730131 its reverse (13103727), we get a palindrome (85833858).

The spelling of 72730131 in words is "seventy-two million, seven hundred thirty thousand, one hundred thirty-one".