231137280 has 448 divisors, whose sum is σ = 943660800. Its totient is φ = 53084160.

The previous prime is 231137273. The next prime is 231137303. The reversal of 231137280 is 82731132.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12165111 + ... + 12165129.

Almost surely, 2^231137280 is an apocalyptic number.

231137280 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 231137280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471830400).

231137280 is an abundant number, since it is smaller than the sum of its proper divisors (712523520).

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

231137280 is a wasteful number, since it uses less digits than its factorization.

231137280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 231137280 is about 15203.1996632288. The cubic root of 231137280 is about 613.7007670227.

The spelling of 231137280 in words is "two hundred thirty-one million, one hundred thirty-seven thousand, two hundred eighty".