55015219 has 16 divisors (see below), whose sum is σ = 64421568. Its totient is φ = 46006272.

The previous prime is 55015217. The next prime is 55015223. The reversal of 55015219 is 91251055.

It is a cyclic number.

It is not a de Polignac number, because 55015219 - 2¹ = 55015217 is a prime.

It is a super-2 number, since 2×55015219² = 6053348643235922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55015217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95059 + ... + 95635.

It is an arithmetic number, because the mean of its divisors is an integer number (4026348).

Almost surely, 2^55015219 is an apocalyptic number.

55015219 is a deficient number, since it is larger than the sum of its proper divisors (9406349).

55015219 is a wasteful number, since it uses less digits than its factorization.

55015219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 55015219 is about 7417.2244808958. The cubic root of 55015219 is about 380.3303198919.

The spelling of 55015219 in words is "fifty-five million, fifteen thousand, two hundred nineteen".