21522246631 has 2 divisors, whose sum is σ = 21522246632. Its totient is φ = 21522246630.

The previous prime is 21522246553. The next prime is 21522246661. The reversal of 21522246631 is 13664222512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21522246631 - 2¹⁵ = 21522213863 is a prime.

It is a super-2 number, since 2×21522246631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21522246661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10761123315 + 10761123316.

It is an arithmetic number, because the mean of its divisors is an integer number (10761123316).

Almost surely, 2^21522246631 is an apocalyptic number.

21522246631 is a deficient number, since it is larger than the sum of its proper divisors (1).

21522246631 is an equidigital number, since it uses as much as digits as its factorization.

21522246631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The spelling of 21522246631 in words is "twenty-one billion, five hundred twenty-two million, two hundred forty-six thousand, six hundred thirty-one".