55212518 has 8 divisors (see below), whose sum is σ = 87177720. Its totient is φ = 26153280.

The previous prime is 55212467. The next prime is 55212523. The reversal of 55212518 is 81521255.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 726443 + ... + 726518.

It is an arithmetic number, because the mean of its divisors is an integer number (10897215).

Almost surely, 2^55212518 is an apocalyptic number.

55212518 is a deficient number, since it is larger than the sum of its proper divisors (31965202).

55212518 is a wasteful number, since it uses less digits than its factorization.

55212518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452982.

The product of its digits is 4000, while the sum is 29.

The square root of 55212518 is about 7430.5126337286. The cubic root of 55212518 is about 380.7844322176.

The spelling of 55212518 in words is "fifty-five million, two hundred twelve thousand, five hundred eighteen".