22157416261 has 2 divisors, whose sum is σ = 22157416262. Its totient is φ = 22157416260.

The previous prime is 22157416249. The next prime is 22157416277. The reversal of 22157416261 is 16261475122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19775390625 + 2382025636 = 140625^2 + 48806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22157416261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22157416261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22157416241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078708130 + 11078708131.

It is an arithmetic number, because the mean of its divisors is an integer number (11078708131).

Almost surely, 2^22157416261 is an apocalyptic number.

It is an amenable number.

22157416261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22157416261 is an equidigital number, since it uses as much as digits as its factorization.

22157416261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The spelling of 22157416261 in words is "twenty-two billion, one hundred fifty-seven million, four hundred sixteen thousand, two hundred sixty-one".