2131400231 has 4 divisors (see below), whose sum is σ = 2132205072. Its totient is φ = 2130595392.

The previous prime is 2131400203. The next prime is 2131400239. The reversal of 2131400231 is 1320041312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131400231 is a prime.

It is a super-2 number, since 2×2131400231² = 9085733889413706722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131400239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398435 + ... + 403748.

It is an arithmetic number, because the mean of its divisors is an integer number (533051268).

Almost surely, 2^2131400231 is an apocalyptic number.

2131400231 is a deficient number, since it is larger than the sum of its proper divisors (804841).

2131400231 is an equidigital number, since it uses as much as digits as its factorization.

2131400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804840.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2131400231 is about 46167.0903458297. The cubic root of 2131400231 is about 1286.9302307650.

Adding to 2131400231 its reverse (1320041312), we get a palindrome (3451441543).

The spelling of 2131400231 in words is "two billion, one hundred thirty-one million, four hundred thousand, two hundred thirty-one".