22131509501 has 2 divisors, whose sum is σ = 22131509502. Its totient is φ = 22131509500.

The previous prime is 22131509461. The next prime is 22131509531. The reversal of 22131509501 is 10590513122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22120612900 + 10896601 = 148730^2 + 3301^2 .

It is a cyclic number.

It is not a de Polignac number, because 22131509501 - 2¹⁸ = 22131247357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22131509531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065754750 + 11065754751.

It is an arithmetic number, because the mean of its divisors is an integer number (11065754751).

Almost surely, 2^22131509501 is an apocalyptic number.

It is an amenable number.

22131509501 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131509501 is an equidigital number, since it uses as much as digits as its factorization.

22131509501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The spelling of 22131509501 in words is "twenty-two billion, one hundred thirty-one million, five hundred nine thousand, five hundred one".