72550511 has 6 divisors (see below), whose sum is σ = 79745736. Its totient is φ = 65954900.

The previous prime is 72550507. The next prime is 72550537. The reversal of 72550511 is 11505527.

It is a happy number.

It is not a de Polignac number, because 72550511 - 2² = 72550507 is a prime.

It is a super-2 number, since 2×72550511² = 10527153292722242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72550561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 299675 + ... + 299916.

It is an arithmetic number, because the mean of its divisors is an integer number (13290956).

Almost surely, 2^72550511 is an apocalyptic number.

72550511 is a deficient number, since it is larger than the sum of its proper divisors (7195225).

72550511 is a wasteful number, since it uses less digits than its factorization.

72550511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599613 (or 599602 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 72550511 is about 8517.6587745695. The cubic root of 72550511 is about 417.0743598547.

The spelling of 72550511 in words is "seventy-two million, five hundred fifty thousand, five hundred eleven".