855632931 has 4 divisors (see below), whose sum is σ = 1140843912. Its totient is φ = 570421952.

The previous prime is 855632929. The next prime is 855632951. The reversal of 855632931 is 139236558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 855632931 - 2¹ = 855632929 is a prime.

It is a super-2 number, since 2×855632931² = 1464215425223301522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (855632951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142605486 + ... + 142605491.

It is an arithmetic number, because the mean of its divisors is an integer number (285210978).

Almost surely, 2^855632931 is an apocalyptic number.

855632931 is a deficient number, since it is larger than the sum of its proper divisors (285210981).

855632931 is a wasteful number, since it uses less digits than its factorization.

855632931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285210980.

The product of its digits is 194400, while the sum is 42.

The square root of 855632931 is about 29251.2039239413. The cubic root of 855632931 is about 949.3561402712.

The spelling of 855632931 in words is "eight hundred fifty-five million, six hundred thirty-two thousand, nine hundred thirty-one".