22751487 has 12 divisors (see below), whose sum is σ = 35850984. Its totient is φ = 13788720.

The previous prime is 22751483. The next prime is 22751513. The reversal of 22751487 is 78415722.

It is not a de Polignac number, because 22751487 - 2² = 22751483 is a prime.

It is a super-2 number, since 2×22751487² = 1035260321422338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22751483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114808 + ... + 115005.

It is an arithmetic number, because the mean of its divisors is an integer number (2987582).

Almost surely, 2^22751487 is an apocalyptic number.

22751487 is a deficient number, since it is larger than the sum of its proper divisors (13099497).

22751487 is a wasteful number, since it uses less digits than its factorization.

22751487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229830 (or 229827 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 22751487 is about 4769.8518844929. The cubic root of 22751487 is about 283.3587288271.

The spelling of 22751487 in words is "twenty-two million, seven hundred fifty-one thousand, four hundred eighty-seven".