231274836 has 72 divisors (see below), whose sum is σ = 632311680. Its totient is φ = 70853184.

The previous prime is 231274819. The next prime is 231274837. The reversal of 231274836 is 638472132.

It is a happy number.

231274836 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 231274836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231274837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122145 + ... + 124023.

Almost surely, 2^231274836 is an apocalyptic number.

231274836 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231274836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316155840).

231274836 is an abundant number, since it is smaller than the sum of its proper divisors (401036844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231274836 is a wasteful number, since it uses less digits than its factorization.

231274836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165 (or 2160 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 231274836 is about 15207.7229064709. The cubic root of 231274836 is about 613.8224861466.

The spelling of 231274836 in words is "two hundred thirty-one million, two hundred seventy-four thousand, eight hundred thirty-six".