202122631 has 2 divisors, whose sum is σ = 202122632. Its totient is φ = 202122630.

The previous prime is 202122623. The next prime is 202122637. The reversal of 202122631 is 136221202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202122631 - 2³ = 202122623 is a prime.

It is a super-2 number, since 2×202122631² = 81707115924724322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202122599 and 202122608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202122637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101061315 + 101061316.

It is an arithmetic number, because the mean of its divisors is an integer number (101061316).

Almost surely, 2^202122631 is an apocalyptic number.

202122631 is a deficient number, since it is larger than the sum of its proper divisors (1).

202122631 is an equidigital number, since it uses as much as digits as its factorization.

202122631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 202122631 is about 14216.9838925139. The cubic root of 202122631 is about 586.8651416461.

Adding to 202122631 its reverse (136221202), we get a palindrome (338343833).

The spelling of 202122631 in words is "two hundred two million, one hundred twenty-two thousand, six hundred thirty-one".