72531105 has 16 divisors (see below), whose sum is σ = 118520064. Its totient is φ = 37859840.

The previous prime is 72531101. The next prime is 72531131. The reversal of 72531105 is 50113527.

It is not a de Polignac number, because 72531105 - 2² = 72531101 is a prime.

It is a super-2 number, since 2×72531105² = 10521522385042050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72531101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50736 + ... + 52145.

It is an arithmetic number, because the mean of its divisors is an integer number (7407504).

Almost surely, 2^72531105 is an apocalyptic number.

It is an amenable number.

72531105 is a deficient number, since it is larger than the sum of its proper divisors (45988959).

72531105 is a wasteful number, since it uses less digits than its factorization.

72531105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102936.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 72531105 is about 8516.5195355849. The cubic root of 72531105 is about 417.0371698259.

The spelling of 72531105 in words is "seventy-two million, five hundred thirty-one thousand, one hundred five".