22501631 has 2 divisors, whose sum is σ = 22501632. Its totient is φ = 22501630.

The previous prime is 22501607. The next prime is 22501639. The reversal of 22501631 is 13610522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22501631 - 2²² = 18307327 is a prime.

It is a super-2 number, since 2×22501631² = 1012646795320322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22501639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11250815 + 11250816.

It is an arithmetic number, because the mean of its divisors is an integer number (11250816).

Almost surely, 2^22501631 is an apocalyptic number.

22501631 is a deficient number, since it is larger than the sum of its proper divisors (1).

22501631 is an equidigital number, since it uses as much as digits as its factorization.

22501631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 22501631 is about 4743.5884096325. The cubic root of 22501631 is about 282.3176299651.

It can be divided in two parts, 22501 and 631, that added together give a palindrome (23132).

The spelling of 22501631 in words is "twenty-two million, five hundred one thousand, six hundred thirty-one".