55125519 has 4 divisors (see below), whose sum is σ = 73500696. Its totient is φ = 36750344.

The previous prime is 55125487. The next prime is 55125547. The reversal of 55125519 is 91552155.

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 55125519 - 2⁵ = 55125487 is a prime.

It is a super-2 number, since 2×55125519² = 6077645690038722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55125519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55125569) 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, 9187584 + ... + 9187589.

It is an arithmetic number, because the mean of its divisors is an integer number (18375174).

Almost surely, 2^55125519 is an apocalyptic number.

55125519 is a deficient number, since it is larger than the sum of its proper divisors (18375177).

55125519 is a wasteful number, since it uses less digits than its factorization.

55125519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18375176.

The product of its digits is 11250, while the sum is 33.

The square root of 55125519 is about 7424.6561536545. The cubic root of 55125519 is about 380.5843249397.

The spelling of 55125519 in words is "fifty-five million, one hundred twenty-five thousand, five hundred nineteen".