231771963 has 8 divisors (see below), whose sum is σ = 310631248. Its totient is φ = 153713664.

The previous prime is 231771919. The next prime is 231771971. The reversal of 231771963 is 369177132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231771963 - 2⁸ = 231771707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231773963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199570 + ... + 200727.

It is an arithmetic number, because the mean of its divisors is an integer number (38828906).

Almost surely, 2^231771963 is an apocalyptic number.

231771963 is a deficient number, since it is larger than the sum of its proper divisors (78859285).

231771963 is a wasteful number, since it uses less digits than its factorization.

231771963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400493.

The product of its digits is 47628, while the sum is 39.

The square root of 231771963 is about 15224.0586901128. The cubic root of 231771963 is about 614.2619767515.

The spelling of 231771963 in words is "two hundred thirty-one million, seven hundred seventy-one thousand, nine hundred sixty-three".