2131231279 has 2 divisors, whose sum is σ = 2131231280. Its totient is φ = 2131231278.

The previous prime is 2131231253. The next prime is 2131231303. The reversal of 2131231279 is 9721321312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131231279 - 2⁹ = 2131230767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2131231279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131231229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065615639 + 1065615640.

It is an arithmetic number, because the mean of its divisors is an integer number (1065615640).

Almost surely, 2^2131231279 is an apocalyptic number.

2131231279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131231279 is an equidigital number, since it uses as much as digits as its factorization.

2131231279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 2131231279 is about 46165.2605213054. The cubic root of 2131231279 is about 1286.8962257045.

The spelling of 2131231279 in words is "two billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred seventy-nine".