22131502493 has 2 divisors, whose sum is σ = 22131502494. Its totient is φ = 22131502492.

The previous prime is 22131502447. The next prime is 22131502501. The reversal of 22131502493 is 39420513122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20931434329 + 1200068164 = 144677^2 + 34642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22131502493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22131502433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065751246 + 11065751247.

It is an arithmetic number, because the mean of its divisors is an integer number (11065751247).

Almost surely, 2^22131502493 is an apocalyptic number.

It is an amenable number.

22131502493 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131502493 is an equidigital number, since it uses as much as digits as its factorization.

22131502493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 22131502493 in words is "twenty-two billion, one hundred thirty-one million, five hundred two thousand, four hundred ninety-three".