56649451 has 2 divisors, whose sum is σ = 56649452. Its totient is φ = 56649450.

The previous prime is 56649449. The next prime is 56649487. The reversal of 56649451 is 15494665.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56649451 - 2¹ = 56649449 is a prime.

Together with 56649449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56649401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28324725 + 28324726.

It is an arithmetic number, because the mean of its divisors is an integer number (28324726).

Almost surely, 2^56649451 is an apocalyptic number.

56649451 is a deficient number, since it is larger than the sum of its proper divisors (1).

56649451 is an equidigital number, since it uses as much as digits as its factorization.

56649451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 56649451 is about 7526.5829564285. The cubic root of 56649451 is about 384.0595497744.

The spelling of 56649451 in words is "fifty-six million, six hundred forty-nine thousand, four hundred fifty-one".