5656235021 has 2 divisors, whose sum is σ = 5656235022. Its totient is φ = 5656235020.

The previous prime is 5656234993. The next prime is 5656235033. The reversal of 5656235021 is 1205326565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4893702025 + 762532996 = 69955^2 + 27614^2 .

It is a cyclic number.

It is not a de Polignac number, because 5656235021 - 2²⁶ = 5589126157 is a prime.

It is a super-2 number, since 2×5656235021² = 63985989225573740882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5656205021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828117510 + 2828117511.

It is an arithmetic number, because the mean of its divisors is an integer number (2828117511).

Almost surely, 2^5656235021 is an apocalyptic number.

It is an amenable number.

5656235021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656235021 is an equidigital number, since it uses as much as digits as its factorization.

5656235021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 5656235021 is about 75207.9451986291. The cubic root of 5656235021 is about 1781.7324189906.

The spelling of 5656235021 in words is "five billion, six hundred fifty-six million, two hundred thirty-five thousand, twenty-one".