5215646081 has 2 divisors, whose sum is σ = 5215646082. Its totient is φ = 5215646080.

The previous prime is 5215646011. The next prime is 5215646099. The reversal of 5215646081 is 1806465125.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3455088400 + 1760557681 = 58780^2 + 41959^2 .

It is a cyclic number.

It is not a de Polignac number, because 5215646081 - 2³⁰ = 4141904257 is a prime.

It is a super-2 number, since 2×5215646081² = 54405928084501317122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5215646011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2607823040 + 2607823041.

It is an arithmetic number, because the mean of its divisors is an integer number (2607823041).

Almost surely, 2^5215646081 is an apocalyptic number.

It is an amenable number.

5215646081 is a deficient number, since it is larger than the sum of its proper divisors (1).

5215646081 is an equidigital number, since it uses as much as digits as its factorization.

5215646081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 5215646081 is about 72219.4300794461. The cubic root of 5215646081 is about 1734.2140666564.

The spelling of 5215646081 in words is "five billion, two hundred fifteen million, six hundred forty-six thousand, eighty-one".