56221261 has 8 divisors (see below), whose sum is σ = 59648184. Its totient is φ = 52807680.

The previous prime is 56221213. The next prime is 56221273. The reversal of 56221261 is 16212265.

It can be written as a sum of positive squares in 4 ways, for example, as 13645636 + 42575625 = 3694^2 + 6525^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56221261 - 2¹⁵ = 56188493 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 (56221201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6141 + ... + 12253.

It is an arithmetic number, because the mean of its divisors is an integer number (7456023).

Almost surely, 2^56221261 is an apocalyptic number.

It is an amenable number.

56221261 is a deficient number, since it is larger than the sum of its proper divisors (3426923).

56221261 is a wasteful number, since it uses less digits than its factorization.

56221261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671.

The product of its digits is 1440, while the sum is 25.

The square root of 56221261 is about 7498.0838218841. The cubic root of 56221261 is about 383.0894518458.

The spelling of 56221261 in words is "fifty-six million, two hundred twenty-one thousand, two hundred sixty-one".