231388047231 has 24 divisors (see below), whose sum is σ = 344861892480. Its totient is φ = 137858299920.

The previous prime is 231388047229. The next prime is 231388047239. The reversal of 231388047231 is 132740883132.

It is a happy number.

It is not a de Polignac number, because 231388047231 - 2¹ = 231388047229 is a prime.

It is a super-2 number, since 2×231388047231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231388047239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5380555 + ... + 5423388.

It is an arithmetic number, because the mean of its divisors is an integer number (14369245520).

Almost surely, 2^231388047231 is an apocalyptic number.

231388047231 is a deficient number, since it is larger than the sum of its proper divisors (113473845249).

231388047231 is a wasteful number, since it uses less digits than its factorization.

231388047231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10804027 (or 10804016 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 231388047231 in words is "two hundred thirty-one billion, three hundred eighty-eight million, forty-seven thousand, two hundred thirty-one".