2131311397 has 8 divisors (see below), whose sum is σ = 2177361792. Its totient is φ = 2085290400.

The previous prime is 2131311389. The next prime is 2131311401. The reversal of 2131311397 is 7931131312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131311397 - 2³ = 2131311389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131311367) 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 7 ways as a sum of consecutive naturals, for example, 203622 + ... + 213832.

It is an arithmetic number, because the mean of its divisors is an integer number (272170224).

Almost surely, 2^2131311397 is an apocalyptic number.

It is an amenable number.

2131311397 is a deficient number, since it is larger than the sum of its proper divisors (46050395).

2131311397 is a wasteful number, since it uses less digits than its factorization.

2131311397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14699.

The product of its digits is 3402, while the sum is 31.

The square root of 2131311397 is about 46166.1282435510. The cubic root of 2131311397 is about 1286.9123513217.

The spelling of 2131311397 in words is "two billion, one hundred thirty-one million, three hundred eleven thousand, three hundred ninety-seven".