5131399157 has 4 divisors (see below), whose sum is σ = 5256555276. Its totient is φ = 5006243040.

The previous prime is 5131399121. The next prime is 5131399159. The reversal of 5131399157 is 7519931315.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1005777796 + 4125621361 = 31714^2 + 64231^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131399157 - 2⁸ = 5131398901 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 (5131399159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62577998 + ... + 62578079.

It is an arithmetic number, because the mean of its divisors is an integer number (1314138819).

Almost surely, 2^5131399157 is an apocalyptic number.

It is an amenable number.

5131399157 is a deficient number, since it is larger than the sum of its proper divisors (125156119).

5131399157 is a wasteful number, since it uses less digits than its factorization.

5131399157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125156118.

The product of its digits is 127575, while the sum is 44.

The square root of 5131399157 is about 71633.7850249448. The cubic root of 5131399157 is about 1724.8259049394.

The spelling of 5131399157 in words is "five billion, one hundred thirty-one million, three hundred ninety-nine thousand, one hundred fifty-seven".