56621801 has 4 divisors (see below), whose sum is σ = 56698752. Its totient is φ = 56544852.

The previous prime is 56621797. The next prime is 56621813. The reversal of 56621801 is 10812665.

It is a happy number.

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 56621801 - 2² = 56621797 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (56621821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37361 + ... + 38846.

It is an arithmetic number, because the mean of its divisors is an integer number (14174688).

Almost surely, 2^56621801 is an apocalyptic number.

It is an amenable number.

56621801 is a deficient number, since it is larger than the sum of its proper divisors (76951).

56621801 is an equidigital number, since it uses as much as digits as its factorization.

56621801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76950.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 56621801 is about 7524.7459093314. The cubic root of 56621801 is about 383.9970544660.

The spelling of 56621801 in words is "fifty-six million, six hundred twenty-one thousand, eight hundred one".