72553571 has 16 divisors (see below), whose sum is σ = 78796800. Its totient is φ = 66584448.

The previous prime is 72553567. The next prime is 72553573. The reversal of 72553571 is 17535527.

It is a cyclic number.

It is not a de Polignac number, because 72553571 - 2² = 72553567 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72553573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100550 + ... + 101268.

It is an arithmetic number, because the mean of its divisors is an integer number (4924800).

Almost surely, 2^72553571 is an apocalyptic number.

72553571 is a deficient number, since it is larger than the sum of its proper divisors (6243229).

72553571 is a wasteful number, since it uses less digits than its factorization.

72553571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898.

The product of its digits is 36750, while the sum is 35.

The square root of 72553571 is about 8517.8383995002. The cubic root of 72553571 is about 417.0802234918.

The spelling of 72553571 in words is "seventy-two million, five hundred fifty-three thousand, five hundred seventy-one".