72520511 has 8 divisors (see below), whose sum is σ = 87242880. Its totient is φ = 58888728.

The previous prime is 72520507. The next prime is 72520529. The reversal of 72520511 is 11502527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72520511 - 2² = 72520507 is a prime.

It is a super-2 number, since 2×72520511² = 10518449031402242, 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 (72520211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272501 + ... + 272766.

It is an arithmetic number, because the mean of its divisors is an integer number (10905360).

Almost surely, 2^72520511 is an apocalyptic number.

72520511 is a deficient number, since it is larger than the sum of its proper divisors (14722369).

72520511 is a wasteful number, since it uses less digits than its factorization.

72520511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545293.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 72520511 is about 8515.8975451798. The cubic root of 72520511 is about 417.0168644829.

The spelling of 72520511 in words is "seventy-two million, five hundred twenty thousand, five hundred eleven".