56398481 has 2 divisors, whose sum is σ = 56398482. Its totient is φ = 56398480.

The previous prime is 56398429. The next prime is 56398483. The reversal of 56398481 is 18489365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33166081 + 23232400 = 5759^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56398481 is a prime.

It is a super-2 number, since 2×56398481² = 6361577318214722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 56398483, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56398483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28199240 + 28199241.

It is an arithmetic number, because the mean of its divisors is an integer number (28199241).

Almost surely, 2^56398481 is an apocalyptic number.

It is an amenable number.

56398481 is a deficient number, since it is larger than the sum of its proper divisors (1).

56398481 is an equidigital number, since it uses as much as digits as its factorization.

56398481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 56398481 is about 7509.8922096126. The cubic root of 56398481 is about 383.4915530018.

The spelling of 56398481 in words is "fifty-six million, three hundred ninety-eight thousand, four hundred eighty-one".