56288097421 has 2 divisors, whose sum is σ = 56288097422. Its totient is φ = 56288097420.

The previous prime is 56288097353. The next prime is 56288097443. The reversal of 56288097421 is 12479088265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52647302500 + 3640794921 = 229450^2 + 60339^2 .

It is a cyclic number.

It is not a de Polignac number, because 56288097421 - 2⁷ = 56288097293 is a prime.

It is a super-2 number, since 2×56288097421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56288097461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28144048710 + 28144048711.

It is an arithmetic number, because the mean of its divisors is an integer number (28144048711).

Almost surely, 2^56288097421 is an apocalyptic number.

It is an amenable number.

56288097421 is a deficient number, since it is larger than the sum of its proper divisors (1).

56288097421 is an equidigital number, since it uses as much as digits as its factorization.

56288097421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 56288097421 in words is "fifty-six billion, two hundred eighty-eight million, ninety-seven thousand, four hundred twenty-one".