6131154721 has 2 divisors, whose sum is σ = 6131154722. Its totient is φ = 6131154720.

The previous prime is 6131154649. The next prime is 6131154763. The reversal of 6131154721 is 1274511316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5509350625 + 621804096 = 74225^2 + 24936^2 .

It is a cyclic number.

It is not a de Polignac number, because 6131154721 - 2²⁹ = 5594283809 is a prime.

It is not a weakly prime, because it can be changed into another prime (6131154521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3065577360 + 3065577361.

It is an arithmetic number, because the mean of its divisors is an integer number (3065577361).

Almost surely, 2^6131154721 is an apocalyptic number.

It is an amenable number.

6131154721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6131154721 is an equidigital number, since it uses as much as digits as its factorization.

6131154721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 6131154721 is about 78301.6904095946. The cubic root of 6131154721 is about 1830.2654935460.

The spelling of 6131154721 in words is "six billion, one hundred thirty-one million, one hundred fifty-four thousand, seven hundred twenty-one".