231877845 has 12 divisors (see below), whose sum is σ = 401921676. Its totient is φ = 123668160.

The previous prime is 231877831. The next prime is 231877879. The reversal of 231877845 is 548778132.

It can be written as a sum of positive squares in 2 ways, for example, as 40525956 + 191351889 = 6366^2 + 13833^2 .

It is not a de Polignac number, because 231877845 - 2⁴ = 231877829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 5152841 = 231877845 / (2 + 3 + 1 + 8 + 7 + 7 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 231877845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2576376 + ... + 2576465.

It is an arithmetic number, because the mean of its divisors is an integer number (33493473).

Almost surely, 2^231877845 is an apocalyptic number.

It is an amenable number.

231877845 is a deficient number, since it is larger than the sum of its proper divisors (170043831).

231877845 is a wasteful number, since it uses less digits than its factorization.

231877845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152852 (or 5152849 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 231877845 is about 15227.5357494245. The cubic root of 231877845 is about 614.3555017033.

The spelling of 231877845 in words is "two hundred thirty-one million, eight hundred seventy-seven thousand, eight hundred forty-five".