72552817 has 4 divisors (see below), whose sum is σ = 72958320. Its totient is φ = 72147316.

The previous prime is 72552793. The next prime is 72552829. The reversal of 72552817 is 71825527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72552817 - 2¹¹ = 72550769 is a prime.

It is a super-2 number, since 2×72552817² = 10527822509270978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72552917) 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 3 ways as a sum of consecutive naturals, for example, 202483 + ... + 202840.

It is an arithmetic number, because the mean of its divisors is an integer number (18239580).

Almost surely, 2^72552817 is an apocalyptic number.

It is an amenable number.

72552817 is a deficient number, since it is larger than the sum of its proper divisors (405503).

72552817 is a wasteful number, since it uses less digits than its factorization.

72552817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405502.

The product of its digits is 39200, while the sum is 37.

The square root of 72552817 is about 8517.7941393297. The cubic root of 72552817 is about 417.0787786763.

The spelling of 72552817 in words is "seventy-two million, five hundred fifty-two thousand, eight hundred seventeen".