55415015 has 4 divisors (see below), whose sum is σ = 66498024. Its totient is φ = 44332008.

The previous prime is 55414987. The next prime is 55415047. The reversal of 55415015 is 51051455.

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 55415015 - 2¹⁶ = 55349479 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, 5541497 + ... + 5541506.

It is an arithmetic number, because the mean of its divisors is an integer number (16624506).

Almost surely, 2^55415015 is an apocalyptic number.

55415015 is a deficient number, since it is larger than the sum of its proper divisors (11083009).

55415015 is a wasteful number, since it uses less digits than its factorization.

55415015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11083008.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 55415015 is about 7444.1262079575. The cubic root of 55415015 is about 381.2493849314.

The spelling of 55415015 in words is "fifty-five million, four hundred fifteen thousand, fifteen".