5166121531 has 2 divisors, whose sum is σ = 5166121532. Its totient is φ = 5166121530.

The previous prime is 5166121487. The next prime is 5166121561. The reversal of 5166121531 is 1351216615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5166121531 - 2⁷ = 5166121403 is a prime.

It is a super-2 number, since 2×5166121531² = 53377623346123567922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5166121493 and 5166121502.

It is not a weakly prime, because it can be changed into another prime (5166121561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2583060765 + 2583060766.

It is an arithmetic number, because the mean of its divisors is an integer number (2583060766).

Almost surely, 2^5166121531 is an apocalyptic number.

5166121531 is a deficient number, since it is larger than the sum of its proper divisors (1).

5166121531 is an equidigital number, since it uses as much as digits as its factorization.

5166121531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 5166121531 is about 71875.7367336155. The cubic root of 5166121531 is about 1728.7075928829.

The spelling of 5166121531 in words is "five billion, one hundred sixty-six million, one hundred twenty-one thousand, five hundred thirty-one".