55880621 has 4 divisors (see below), whose sum is σ = 56667744. Its totient is φ = 55093500.

The previous prime is 55880609. The next prime is 55880659. The reversal of 55880621 is 12608855.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55880621 - 2²² = 51686317 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 (55880221) 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, 393455 + ... + 393596.

It is an arithmetic number, because the mean of its divisors is an integer number (14166936).

Almost surely, 2^55880621 is an apocalyptic number.

It is an amenable number.

55880621 is a deficient number, since it is larger than the sum of its proper divisors (787123).

55880621 is an equidigital number, since it uses as much as digits as its factorization.

55880621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787122.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 55880621 is about 7475.3341731323. The cubic root of 55880621 is about 382.3141814628.

The spelling of 55880621 in words is "fifty-five million, eight hundred eighty thousand, six hundred twenty-one".