231402771 has 32 divisors (see below), whose sum is σ = 349875200. Its totient is φ = 151126560.

The previous prime is 231402757. The next prime is 231402781. The reversal of 231402771 is 177204132.

It is a happy number.

It is not a de Polignac number, because 231402771 - 2¹⁵ = 231370003 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (231402751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 334536 + ... + 335226.

It is an arithmetic number, because the mean of its divisors is an integer number (10933600).

Almost surely, 2^231402771 is an apocalyptic number.

231402771 is a deficient number, since it is larger than the sum of its proper divisors (118472429).

231402771 is a wasteful number, since it uses less digits than its factorization.

231402771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 231402771 is about 15211.9285759564. The cubic root of 231402771 is about 613.9356486297.

The spelling of 231402771 in words is "two hundred thirty-one million, four hundred two thousand, seven hundred seventy-one".