56732221 has 8 divisors (see below), whose sum is σ = 69824384. Its totient is φ = 44886960.

The previous prime is 56732209. The next prime is 56732227. The reversal of 56732221 is 12223765.

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 56732221 - 2²⁵ = 23177789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56732221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56732227) 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, 311625 + ... + 311806.

It is an arithmetic number, because the mean of its divisors is an integer number (8728048).

Almost surely, 2^56732221 is an apocalyptic number.

It is an amenable number.

56732221 is a deficient number, since it is larger than the sum of its proper divisors (13092163).

56732221 is a wasteful number, since it uses less digits than its factorization.

56732221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623451.

The product of its digits is 5040, while the sum is 28.

The square root of 56732221 is about 7532.0794605474. The cubic root of 56732221 is about 384.2465073936.

Adding to 56732221 its reverse (12223765), we get a palindrome (68955986).

It can be divided in two parts, 56732 and 221, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 56732221 in words is "fifty-six million, seven hundred thirty-two thousand, two hundred twenty-one".