72572131 has 8 divisors (see below), whose sum is σ = 73206224. Its totient is φ = 71940960.

The previous prime is 72572117. The next prime is 72572141. The reversal of 72572131 is 13127527.

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-72572131 is a prime.

It is a super-2 number, since 2×72572131² = 10533428395762322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72572131.

It is not an unprimeable number, because it can be changed into a prime (72572141) 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, 98641 + ... + 99373.

It is an arithmetic number, because the mean of its divisors is an integer number (9150778).

Almost surely, 2^72572131 is an apocalyptic number.

72572131 is a deficient number, since it is larger than the sum of its proper divisors (634093).

72572131 is a wasteful number, since it uses less digits than its factorization.

72572131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461.

The product of its digits is 2940, while the sum is 28.

The square root of 72572131 is about 8518.9278081223. The cubic root of 72572131 is about 417.1157850263.

Adding to 72572131 its reverse (13127527), we get a palindrome (85699658).

The spelling of 72572131 in words is "seventy-two million, five hundred seventy-two thousand, one hundred thirty-one".