231277920 has 96 divisors (see below), whose sum is σ = 734051808. Its totient is φ = 61206528.

The previous prime is 231277919. The next prime is 231277933. The reversal of 231277920 is 29772132.

231277920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-4 number, since 4×231277920⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

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, 64002 + ... + 67518.

It is an arithmetic number, because the mean of its divisors is an integer number (7646373).

Almost surely, 2^231277920 is an apocalyptic number.

231277920 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 231277920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367025904).

231277920 is an abundant number, since it is smaller than the sum of its proper divisors (502773888).

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

231277920 is a wasteful number, since it uses less digits than its factorization.

231277920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672 (or 3664 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 231277920 is about 15207.8243019835. The cubic root of 231277920 is about 613.8252145313.

The spelling of 231277920 in words is "two hundred thirty-one million, two hundred seventy-seven thousand, nine hundred twenty".