56361491 has 2 divisors, whose sum is σ = 56361492. Its totient is φ = 56361490.

The previous prime is 56361479. The next prime is 56361493. The reversal of 56361491 is 19416365.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56361491 is a prime.

It is a Sophie Germain prime.

Together with 56361493, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3358655 and since 56361491 and 3358655 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56361493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28180745 + 28180746.

It is an arithmetic number, because the mean of its divisors is an integer number (28180746).

Almost surely, 2^56361491 is an apocalyptic number.

56361491 is a deficient number, since it is larger than the sum of its proper divisors (1).

56361491 is an equidigital number, since it uses as much as digits as its factorization.

56361491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 56361491 is about 7507.4290539438. The cubic root of 56361491 is about 383.4076946267.

The spelling of 56361491 in words is "fifty-six million, three hundred sixty-one thousand, four hundred ninety-one".