22651957 has 2 divisors, whose sum is σ = 22651958. Its totient is φ = 22651956.

The previous prime is 22651949. The next prime is 22651999. The reversal of 22651957 is 75915622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22146436 + 505521 = 4706^2 + 711^2 .

It is a cyclic number.

It is not a de Polignac number, because 22651957 - 2³ = 22651949 is a prime.

It is a super-2 number, since 2×22651957² = 1026222311859698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22652957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11325978 + 11325979.

It is an arithmetic number, because the mean of its divisors is an integer number (11325979).

Almost surely, 2^22651957 is an apocalyptic number.

It is an amenable number.

22651957 is a deficient number, since it is larger than the sum of its proper divisors (1).

22651957 is an equidigital number, since it uses as much as digits as its factorization.

22651957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 22651957 is about 4759.4072109875. The cubic root of 22651957 is about 282.9449255411.

It can be divided in two parts, 226519 and 57, that added together give a square (226576 = 476²).

The spelling of 22651957 in words is "twenty-two million, six hundred fifty-one thousand, nine hundred fifty-seven".