56377621 has 8 divisors (see below), whose sum is σ = 57685824. Its totient is φ = 55083840.

The previous prime is 56377613. The next prime is 56377631. The reversal of 56377621 is 12677365.

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 56377621 - 2³ = 56377613 is a prime.

It is a super-2 number, since 2×56377621² = 6356872299239282, 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 (56377631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4510 + ... + 11536.

It is an arithmetic number, because the mean of its divisors is an integer number (7210728).

Almost surely, 2^56377621 is an apocalyptic number.

It is an amenable number.

56377621 is a deficient number, since it is larger than the sum of its proper divisors (1308203).

56377621 is a wasteful number, since it uses less digits than its factorization.

56377621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7211.

The product of its digits is 52920, while the sum is 37.

The square root of 56377621 is about 7508.5032463201. The cubic root of 56377621 is about 383.4442667385. Note that the first 3 decimals are identical.

The spelling of 56377621 in words is "fifty-six million, three hundred seventy-seven thousand, six hundred twenty-one".