56430521 has 4 divisors (see below), whose sum is σ = 64492032. Its totient is φ = 48369012.

The previous prime is 56430487. The next prime is 56430541. The reversal of 56430521 is 12503465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56430521 - 2¹⁸ = 56168377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56430541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4030745 + ... + 4030758.

It is an arithmetic number, because the mean of its divisors is an integer number (16123008).

Almost surely, 2^56430521 is an apocalyptic number.

It is an amenable number.

56430521 is a deficient number, since it is larger than the sum of its proper divisors (8061511).

56430521 is an equidigital number, since it uses as much as digits as its factorization.

56430521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8061510.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 56430521 is about 7512.0250931423. The cubic root of 56430521 is about 383.5641598233.

Adding to 56430521 its reverse (12503465), we get a palindrome (68933986).

The spelling of 56430521 in words is "fifty-six million, four hundred thirty thousand, five hundred twenty-one".