55101619 has 4 divisors (see below), whose sum is σ = 56383096. Its totient is φ = 53820144.

The previous prime is 55101611. The next prime is 55101659. The reversal of 55101619 is 91610155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55101619 - 2³ = 55101611 is a prime.

It is a super-2 number, since 2×55101619² = 6072376832842322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55101611) 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, 640674 + ... + 640759.

It is an arithmetic number, because the mean of its divisors is an integer number (14095774).

Almost surely, 2^55101619 is an apocalyptic number.

55101619 is a deficient number, since it is larger than the sum of its proper divisors (1281477).

55101619 is a wasteful number, since it uses less digits than its factorization.

55101619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281476.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 55101619 is about 7423.0464770201. The cubic root of 55101619 is about 380.5293154487.

The spelling of 55101619 in words is "fifty-five million, one hundred one thousand, six hundred nineteen".