231487520 has 96 divisors (see below), whose sum is σ = 602090496. Its totient is φ = 84099840.

The previous prime is 231487457. The next prime is 231487523. The reversal of 231487520 is 25784132.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231487523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212417 + ... + 213503.

It is an arithmetic number, because the mean of its divisors is an integer number (6271776).

Almost surely, 2^231487520 is an apocalyptic number.

231487520 is a gapful number since it is divisible by the number (20) 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 231487520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301045248).

231487520 is an abundant number, since it is smaller than the sum of its proper divisors (370602976).

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

231487520 is a wasteful number, since it uses less digits than its factorization.

231487520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 231487520 is about 15214.7139309288. The cubic root of 231487520 is about 614.0105887892.

The spelling of 231487520 in words is "two hundred thirty-one million, four hundred eighty-seven thousand, five hundred twenty".