2131394516 has 48 divisors (see below), whose sum is σ = 4037584320. Its totient is φ = 980851200.

The previous prime is 2131394513. The next prime is 2131394519. The reversal of 2131394516 is 6154931312.

It is an interprime number because it is at equal distance from previous prime (2131394513) and next prime (2131394519).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131394513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 568175 + ... + 571913.

It is an arithmetic number, because the mean of its divisors is an integer number (84116340).

Almost surely, 2^2131394516 is an apocalyptic number.

It is an amenable number.

2131394516 is a deficient number, since it is larger than the sum of its proper divisors (1906189804).

2131394516 is a wasteful number, since it uses less digits than its factorization.

2131394516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944 (or 3942 counting only the distinct ones).

The product of its digits is 19440, while the sum is 35.

The square root of 2131394516 is about 46167.0284510493. The cubic root of 2131394516 is about 1286.9290805332.

The spelling of 2131394516 in words is "two billion, one hundred thirty-one million, three hundred ninety-four thousand, five hundred sixteen".