22540251731 has 2 divisors, whose sum is σ = 22540251732. Its totient is φ = 22540251730.

The previous prime is 22540251691. The next prime is 22540251749. The reversal of 22540251731 is 13715204522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22540251731 is a prime.

It is a super-2 number, since 2×22540251731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22540251761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11270125865 + 11270125866.

It is an arithmetic number, because the mean of its divisors is an integer number (11270125866).

Almost surely, 2^22540251731 is an apocalyptic number.

22540251731 is a deficient number, since it is larger than the sum of its proper divisors (1).

22540251731 is an equidigital number, since it uses as much as digits as its factorization.

22540251731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 22540251731 in words is "twenty-two billion, five hundred forty million, two hundred fifty-one thousand, seven hundred thirty-one".