56254721 has 2 divisors, whose sum is σ = 56254722. Its totient is φ = 56254720.

The previous prime is 56254703. The next prime is 56254727. The reversal of 56254721 is 12745265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52780225 + 3474496 = 7265^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 56254721 - 2²² = 52060417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56254727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28127360 + 28127361.

It is an arithmetic number, because the mean of its divisors is an integer number (28127361).

Almost surely, 2^56254721 is an apocalyptic number.

It is an amenable number.

56254721 is a deficient number, since it is larger than the sum of its proper divisors (1).

56254721 is an equidigital number, since it uses as much as digits as its factorization.

56254721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 32.

The square root of 56254721 is about 7500.3147267298. The cubic root of 56254721 is about 383.1654351468.

Adding to 56254721 its reverse (12745265), we get a palindrome (68999986).

The spelling of 56254721 in words is "fifty-six million, two hundred fifty-four thousand, seven hundred twenty-one".