231377 has 4 divisors (see below), whose sum is σ = 232356. Its totient is φ = 230400.

The previous prime is 231367. The next prime is 231379. The reversal of 231377 is 773132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 229441 + 1936 = 479^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 231377 - 2¹⁰ = 230353 is a prime.

It is a super-2 number, since 2×231377² = 107070632258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113 + ... + 689.

It is an arithmetic number, because the mean of its divisors is an integer number (58089).

2²³¹³⁷⁷ is an apocalyptic number.

It is an amenable number.

231377 is a deficient number, since it is larger than the sum of its proper divisors (979).

231377 is an equidigital number, since it uses as much as digits as its factorization.

231377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its digits is 882, while the sum is 23.

The square root of 231377 is about 481.0166317291. The cubic root of 231377 is about 61.3912856735.

The spelling of 231377 in words is "two hundred thirty-one thousand, three hundred seventy-seven".