56226661 has 4 divisors (see below), whose sum is σ = 56241900. Its totient is φ = 56211424.

The previous prime is 56226637. The next prime is 56226691. The reversal of 56226661 is 16662265.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 23668225 + 32558436 = 4865^2 + 5706^2 .

It is a cyclic number.

It is not a de Polignac number, because 56226661 - 2¹¹ = 56224613 is a prime.

It is a super-2 number, since 2×56226661² = 6322874814417842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56226631) 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, 1785 + ... + 10753.

It is an arithmetic number, because the mean of its divisors is an integer number (14060475).

Almost surely, 2^56226661 is an apocalyptic number.

It is an amenable number.

56226661 is a deficient number, since it is larger than the sum of its proper divisors (15239).

56226661 is an equidigital number, since it uses as much as digits as its factorization.

56226661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15238.

The product of its digits is 25920, while the sum is 34.

The square root of 56226661 is about 7498.4439052379. The cubic root of 56226661 is about 383.1017165820.

The spelling of 56226661 in words is "fifty-six million, two hundred twenty-six thousand, six hundred sixty-one".