56505451 has 2 divisors, whose sum is σ = 56505452. Its totient is φ = 56505450.

The previous prime is 56505439. The next prime is 56505479. The reversal of 56505451 is 15450565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56505451 - 2⁹ = 56504939 is a prime.

It is not a weakly prime, because it can be changed into another prime (56505481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28252725 + 28252726.

It is an arithmetic number, because the mean of its divisors is an integer number (28252726).

Almost surely, 2^56505451 is an apocalyptic number.

56505451 is a deficient number, since it is larger than the sum of its proper divisors (1).

56505451 is an equidigital number, since it uses as much as digits as its factorization.

56505451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 56505451 is about 7517.0107755676. The cubic root of 56505451 is about 383.7338537559.

The spelling of 56505451 in words is "fifty-six million, five hundred five thousand, four hundred fifty-one".