855307231 has 4 divisors (see below), whose sum is σ = 857139192. Its totient is φ = 853475272.

The previous prime is 855307199. The next prime is 855307241. The reversal of 855307231 is 132703558.

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 855307231 - 2⁵ = 855307199 is a prime.

It is a super-2 number, since 2×855307231² = 1463100918801774722, 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 (855307241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915280 + ... + 916213.

It is an arithmetic number, because the mean of its divisors is an integer number (214284798).

Almost surely, 2^855307231 is an apocalyptic number.

855307231 is a deficient number, since it is larger than the sum of its proper divisors (1831961).

855307231 is a wasteful number, since it uses less digits than its factorization.

855307231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831960.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 855307231 is about 29245.6361018187. The cubic root of 855307231 is about 949.2356662823.

The spelling of 855307231 in words is "eight hundred fifty-five million, three hundred seven thousand, two hundred thirty-one".