22625531 has 2 divisors, whose sum is σ = 22625532. Its totient is φ = 22625530.

The previous prime is 22625513. The next prime is 22625557. The reversal of 22625531 is 13552622.

Together with previous prime (22625513) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (22625557) can be obtained adding 22625531 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22625531 - 2¹⁰ = 22624507 is a prime.

It is a super-2 number, since 2×22625531² = 1023829306063922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22625531.

It is not a weakly prime, because it can be changed into another prime (22625131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11312765 + 11312766.

It is an arithmetic number, because the mean of its divisors is an integer number (11312766).

Almost surely, 2^22625531 is an apocalyptic number.

22625531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22625531 is an equidigital number, since it uses as much as digits as its factorization.

22625531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 22625531 is about 4756.6302147634. The cubic root of 22625531 is about 282.8348539314.

The spelling of 22625531 in words is "twenty-two million, six hundred twenty-five thousand, five hundred thirty-one".