5161531057 has 4 divisors (see below), whose sum is σ = 5166815076. Its totient is φ = 5156247040.

The previous prime is 5161531049. The next prime is 5161531061. The reversal of 5161531057 is 7501351615.

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 2314668321 + 2846862736 = 48111^2 + 53356^2 .

It is a cyclic number.

It is not a de Polignac number, because 5161531057 - 2³ = 5161531049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5161537057) 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, 2640544 + ... + 2642497.

It is an arithmetic number, because the mean of its divisors is an integer number (1291703769).

Almost surely, 2^5161531057 is an apocalyptic number.

It is an amenable number.

5161531057 is a deficient number, since it is larger than the sum of its proper divisors (5284019).

5161531057 is an equidigital number, since it uses as much as digits as its factorization.

5161531057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284018.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 5161531057 is about 71843.7962318251. The cubic root of 5161531057 is about 1728.1954137546.

The spelling of 5161531057 in words is "five billion, one hundred sixty-one million, five hundred thirty-one thousand, fifty-seven".