22520715 has 16 divisors (see below), whose sum is σ = 41180928. Its totient is φ = 10295136.

The previous prime is 22520711. The next prime is 22520723. The reversal of 22520715 is 51702522.

It is not a de Polignac number, because 22520715 - 2² = 22520711 is a prime.

It is a super-2 number, since 2×22520715² = 1014365208222450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22520711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107137 + ... + 107346.

It is an arithmetic number, because the mean of its divisors is an integer number (2573808).

Almost surely, 2^22520715 is an apocalyptic number.

22520715 is a deficient number, since it is larger than the sum of its proper divisors (18660213).

22520715 is a wasteful number, since it uses less digits than its factorization.

22520715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214498.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 22520715 is about 4745.5995406271. The cubic root of 22520715 is about 282.3974201400.

The spelling of 22520715 in words is "twenty-two million, five hundred twenty thousand, seven hundred fifteen".