56253621 has 8 divisors (see below), whose sum is σ = 75333280. Its totient is φ = 37338192.

The previous prime is 56253611. The next prime is 56253641. The reversal of 56253621 is 12635265.

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

It is not a de Polignac number, because 56253621 - 2⁶ = 56253557 is a prime.

It is a super-2 number, since 2×56253621² = 6328939751223282, 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 (56253601) 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, 40255 + ... + 41628.

It is an arithmetic number, because the mean of its divisors is an integer number (9416660).

Almost surely, 2^56253621 is an apocalyptic number.

It is an amenable number.

56253621 is a deficient number, since it is larger than the sum of its proper divisors (19079659).

56253621 is a wasteful number, since it uses less digits than its factorization.

56253621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82115.

The product of its digits is 10800, while the sum is 30.

The square root of 56253621 is about 7500.2413961152. The cubic root of 56253621 is about 383.1629376691.

Adding to 56253621 its reverse (12635265), we get a palindrome (68888886).

The spelling of 56253621 in words is "fifty-six million, two hundred fifty-three thousand, six hundred twenty-one".