55190015 has 4 divisors (see below), whose sum is σ = 66228024. Its totient is φ = 44152008.

The previous prime is 55189999. The next prime is 55190021. The reversal of 55190015 is 51009155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51009155 = 5 ⋅10201831.

It is a cyclic number.

It is not a de Polignac number, because 55190015 - 2⁴ = 55189999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5518997 + ... + 5519006.

It is an arithmetic number, because the mean of its divisors is an integer number (16557006).

Almost surely, 2^55190015 is an apocalyptic number.

55190015 is a deficient number, since it is larger than the sum of its proper divisors (11038009).

55190015 is a wasteful number, since it uses less digits than its factorization.

55190015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038008.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 55190015 is about 7428.9982501007. The cubic root of 55190015 is about 380.7326930059.

Adding to 55190015 its sum of digits (26), we get a square (55190041 = 7429²).

The spelling of 55190015 in words is "fifty-five million, one hundred ninety thousand, fifteen".