851376631 has 16 divisors (see below), whose sum is σ = 982810624. Its totient is φ = 722421504.

The previous prime is 851376629. The next prime is 851376709. The reversal of 851376631 is 136673158.

It is a happy number.

It is not a de Polignac number, because 851376631 - 2¹ = 851376629 is a prime.

It is a super-2 number, since 2×851376631² = 1449684335625820322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851376611) 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, 597586 + ... + 599008.

It is an arithmetic number, because the mean of its divisors is an integer number (61425664).

Almost surely, 2^851376631 is an apocalyptic number.

851376631 is a deficient number, since it is larger than the sum of its proper divisors (131433993).

851376631 is a wasteful number, since it uses less digits than its factorization.

851376631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its digits is 90720, while the sum is 40.

The square root of 851376631 is about 29178.3589497422. The cubic root of 851376631 is about 947.7793491314.

The spelling of 851376631 in words is "eight hundred fifty-one million, three hundred seventy-six thousand, six hundred thirty-one".