56526421 has 4 divisors (see below), whose sum is σ = 64601632. Its totient is φ = 48451212.

The previous prime is 56526409. The next prime is 56526451. The reversal of 56526421 is 12462565.

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 56526421 - 2⁵ = 56526389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56526401) 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, 4037595 + ... + 4037608.

It is an arithmetic number, because the mean of its divisors is an integer number (16150408).

Almost surely, 2^56526421 is an apocalyptic number.

It is an amenable number.

56526421 is a deficient number, since it is larger than the sum of its proper divisors (8075211).

56526421 is an equidigital number, since it uses as much as digits as its factorization.

56526421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8075210.

The product of its digits is 14400, while the sum is 31.

The square root of 56526421 is about 7518.4054825475. The cubic root of 56526421 is about 383.7813176350.

Adding to 56526421 its reverse (12462565), we get a palindrome (68988986).

The spelling of 56526421 in words is "fifty-six million, five hundred twenty-six thousand, four hundred twenty-one".