72531500 has 24 divisors (see below), whose sum is σ = 158409888. Its totient is φ = 29012400.

The previous prime is 72531463. The next prime is 72531521. The reversal of 72531500 is 513527.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72032 + ... + 73031.

It is an arithmetic number, because the mean of its divisors is an integer number (6600412).

Almost surely, 2^72531500 is an apocalyptic number.

It is an amenable number.

72531500 is an abundant number, since it is smaller than the sum of its proper divisors (85878388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72531500 is a wasteful number, since it uses less digits than its factorization.

72531500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145082 (or 145070 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 72531500 is about 8516.5427257779. The cubic root of 72531500 is about 417.0379268776.

The spelling of 72531500 in words is "seventy-two million, five hundred thirty-one thousand, five hundred".