231780 has 24 divisors (see below), whose sum is σ = 649152. Its totient is φ = 61792.

The previous prime is 231779. The next prime is 231799. The reversal of 231780 is 87132.

231780 = T₉₅ + T₉₆ + ... + T₁₃₀.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1872 + ... + 1991.

It is an arithmetic number, because the mean of its divisors is an integer number (27048).

2²³¹⁷⁸⁰ is an apocalyptic number.

231780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231780 is an abundant number, since it is smaller than the sum of its proper divisors (417372).

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

231780 is a wasteful number, since it uses less digits than its factorization.

231780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875 (or 3873 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 231780 is about 481.4353539158. The cubic root of 231780 is about 61.4269076785.

The spelling of 231780 in words is "two hundred thirty-one thousand, seven hundred eighty".