231249816 has 120 divisors (see below), whose sum is σ = 753566220. Its totient is φ = 66062304.

The previous prime is 231249803. The next prime is 231249833. The reversal of 231249816 is 618942132.

231249816 is digitally balanced in base 2, 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 nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 28111 + ... + 35393.

Almost surely, 2^231249816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231249816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376783110).

231249816 is an abundant number, since it is smaller than the sum of its proper divisors (522316404).

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

231249816 is a wasteful number, since it uses less digits than its factorization.

231249816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7315 (or 7295 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 231249816 is about 15206.9002758616. The cubic root of 231249816 is about 613.8003503007.

It can be divided in two parts, 231 and 249816, that added together give a cube (250047 = 63³).

The spelling of 231249816 in words is "two hundred thirty-one million, two hundred forty-nine thousand, eight hundred sixteen".