55280619 has 6 divisors (see below), whose sum is σ = 79849796. Its totient is φ = 36853740.

The previous prime is 55280611. The next prime is 55280663. The reversal of 55280619 is 91608255.

It is a happy number.

It is not a de Polignac number, because 55280619 - 2³ = 55280611 is a prime.

It is a super-2 number, since 2×55280619² = 6111893674046322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55280611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3071137 + ... + 3071154.

Almost surely, 2^55280619 is an apocalyptic number.

55280619 is a deficient number, since it is larger than the sum of its proper divisors (24569177).

55280619 is a wasteful number, since it uses less digits than its factorization.

55280619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6142297 (or 6142294 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 55280619 is about 7435.0937452059. The cubic root of 55280619 is about 380.9409253894.

The spelling of 55280619 in words is "fifty-five million, two hundred eighty thousand, six hundred nineteen".