855745231 has 4 divisors (see below), whose sum is σ = 933540264. Its totient is φ = 777950200.

The previous prime is 855745211. The next prime is 855745259. The reversal of 855745231 is 132547558.

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 855745231 - 2⁷ = 855745103 is a prime.

It is a super-2 number, since 2×855745231² = 1464599800758486722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855745211) 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, 38897500 + ... + 38897521.

It is an arithmetic number, because the mean of its divisors is an integer number (233385066).

Almost surely, 2^855745231 is an apocalyptic number.

855745231 is a deficient number, since it is larger than the sum of its proper divisors (77795033).

855745231 is a wasteful number, since it uses less digits than its factorization.

855745231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77795032.

The product of its digits is 168000, while the sum is 40.

The square root of 855745231 is about 29253.1234400705. The cubic root of 855745231 is about 949.3976721114.

The spelling of 855745231 in words is "eight hundred fifty-five million, seven hundred forty-five thousand, two hundred thirty-one".