2192631257 has 2 divisors, whose sum is σ = 2192631258. Its totient is φ = 2192631256.

The previous prime is 2192631227. The next prime is 2192631269. The reversal of 2192631257 is 7521362912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1291971136 + 900660121 = 35944^2 + 30011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2192631257 - 2²² = 2188436953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2192631257.

It is not a weakly prime, because it can be changed into another prime (2192631227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1096315628 + 1096315629.

It is an arithmetic number, because the mean of its divisors is an integer number (1096315629).

Almost surely, 2^2192631257 is an apocalyptic number.

It is an amenable number.

2192631257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2192631257 is an equidigital number, since it uses as much as digits as its factorization.

2192631257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 2192631257 is about 46825.5406482403. The cubic root of 2192631257 is about 1299.1377432037.

The spelling of 2192631257 in words is "two billion, one hundred ninety-two million, six hundred thirty-one thousand, two hundred fifty-seven".