5165242921 has 2 divisors, whose sum is σ = 5165242922. Its totient is φ = 5165242920.

The previous prime is 5165242877. The next prime is 5165242931. The reversal of 5165242921 is 1292425615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4470393321 + 694849600 = 66861^2 + 26360^2 .

It is a cyclic number.

It is not a de Polignac number, because 5165242921 - 2¹⁷ = 5165111849 is a prime.

It is a super-2 number, since 2×5165242921² = 53359468865881224482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5165242931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2582621460 + 2582621461.

It is an arithmetic number, because the mean of its divisors is an integer number (2582621461).

Almost surely, 2^5165242921 is an apocalyptic number.

It is an amenable number.

5165242921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5165242921 is an equidigital number, since it uses as much as digits as its factorization.

5165242921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 5165242921 is about 71869.6244668080. The cubic root of 5165242921 is about 1728.6095860331.

The spelling of 5165242921 in words is "five billion, one hundred sixty-five million, two hundred forty-two thousand, nine hundred twenty-one".