202131971 has 2 divisors, whose sum is σ = 202131972. Its totient is φ = 202131970.

The previous prime is 202131953. The next prime is 202131977. The reversal of 202131971 is 179131202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202131971 - 2¹⁰ = 202130947 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202131971.

It is not a weakly prime, because it can be changed into another prime (202131977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101065985 + 101065986.

It is an arithmetic number, because the mean of its divisors is an integer number (101065986).

Almost surely, 2^202131971 is an apocalyptic number.

202131971 is a deficient number, since it is larger than the sum of its proper divisors (1).

202131971 is an equidigital number, since it uses as much as digits as its factorization.

202131971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 202131971 is about 14217.3123690802. The cubic root of 202131971 is about 586.8741811023.

The spelling of 202131971 in words is "two hundred two million, one hundred thirty-one thousand, nine hundred seventy-one".