5131440997 has 2 divisors, whose sum is σ = 5131440998. Its totient is φ = 5131440996.

The previous prime is 5131440959. The next prime is 5131441031. The reversal of 5131440997 is 7990441315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4974339841 + 157101156 = 70529^2 + 12534^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131440997 - 2⁷ = 5131440869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5131440917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2565720498 + 2565720499.

It is an arithmetic number, because the mean of its divisors is an integer number (2565720499).

Almost surely, 2^5131440997 is an apocalyptic number.

It is an amenable number.

5131440997 is a deficient number, since it is larger than the sum of its proper divisors (1).

5131440997 is an equidigital number, since it uses as much as digits as its factorization.

5131440997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 5131440997 is about 71634.0770653186. The cubic root of 5131440997 is about 1724.8305928434.

The spelling of 5131440997 in words is "five billion, one hundred thirty-one million, four hundred forty thousand, nine hundred ninety-seven".