82631431 has 2 divisors, whose sum is σ = 82631432. Its totient is φ = 82631430.

The previous prime is 82631371. The next prime is 82631443. The reversal of 82631431 is 13413628.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82631431 - 2⁷ = 82631303 is a prime.

It is a super-2 number, since 2×82631431² = 13655906778215522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82631431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82631491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41315715 + 41315716.

It is an arithmetic number, because the mean of its divisors is an integer number (41315716).

Almost surely, 2^82631431 is an apocalyptic number.

82631431 is a deficient number, since it is larger than the sum of its proper divisors (1).

82631431 is an equidigital number, since it uses as much as digits as its factorization.

82631431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 82631431 is about 9090.1832214758. The cubic root of 82631431 is about 435.5604367593.

The spelling of 82631431 in words is "eighty-two million, six hundred thirty-one thousand, four hundred thirty-one".