3165145021 has 2 divisors, whose sum is σ = 3165145022. Its totient is φ = 3165145020.

The previous prime is 3165145007. The next prime is 3165145031. The reversal of 3165145021 is 1205415613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2589384996 + 575760025 = 50886^2 + 23995^2 .

It is a cyclic number.

It is not a de Polignac number, because 3165145021 - 2⁷ = 3165144893 is a prime.

It is a super-2 number, since 2×3165145021² = 20036286007922180882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3165145031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1582572510 + 1582572511.

It is an arithmetic number, because the mean of its divisors is an integer number (1582572511).

Almost surely, 2^3165145021 is an apocalyptic number.

It is an amenable number.

3165145021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3165145021 is an equidigital number, since it uses as much as digits as its factorization.

3165145021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 3165145021 is about 56259.6215860007. The cubic root of 3165145021 is about 1468.2427706025.

The spelling of 3165145021 in words is "three billion, one hundred sixty-five million, one hundred forty-five thousand, twenty-one".