812701631 has 16 divisors (see below), whose sum is σ = 962176320. Its totient is φ = 671953920.

The previous prime is 812701613. The next prime is 812701639. The reversal of 812701631 is 136107218.

It is not a de Polignac number, because 812701631 - 2⁶ = 812701567 is a prime.

It is a super-2 number, since 2×812701631² = 1320967882060120322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 812701594 and 812701603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812701639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9635 + ... + 41451.

It is an arithmetic number, because the mean of its divisors is an integer number (60136020).

Almost surely, 2^812701631 is an apocalyptic number.

812701631 is a deficient number, since it is larger than the sum of its proper divisors (149474689).

812701631 is a wasteful number, since it uses less digits than its factorization.

812701631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31954.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 812701631 is about 28507.9222497887. The cubic root of 812701631 is about 933.2049715337.

Adding to 812701631 its reverse (136107218), we get a palindrome (948808849).

The spelling of 812701631 in words is "eight hundred twelve million, seven hundred one thousand, six hundred thirty-one".