22501572 has 12 divisors (see below), whose sum is σ = 52503696. Its totient is φ = 7500520.

The previous prime is 22501571. The next prime is 22501573. The reversal of 22501572 is 27510522.

It is an interprime number because it is at equal distance from previous prime (22501571) and next prime (22501573).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (22501571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937554 + ... + 937577.

It is an arithmetic number, because the mean of its divisors is an integer number (4375308).

Almost surely, 2^22501572 is an apocalyptic number.

It is an amenable number.

22501572 is an abundant number, since it is smaller than the sum of its proper divisors (30002124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22501572 is a wasteful number, since it uses less digits than its factorization.

22501572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875138 (or 1875136 counting only the distinct ones).

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

The square root of 22501572 is about 4743.5821907078. The cubic root of 22501572 is about 282.3173832163.

The spelling of 22501572 in words is "twenty-two million, five hundred one thousand, five hundred seventy-two".