55424015 has 4 divisors (see below), whose sum is σ = 66508824. Its totient is φ = 44339208.

The previous prime is 55424011. The next prime is 55424021. The reversal of 55424015 is 51042455.

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 55424015 - 2² = 55424011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55424011) 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, 5542397 + ... + 5542406.

It is an arithmetic number, because the mean of its divisors is an integer number (16627206).

Almost surely, 2^55424015 is an apocalyptic number.

55424015 is a deficient number, since it is larger than the sum of its proper divisors (11084809).

55424015 is a wasteful number, since it uses less digits than its factorization.

55424015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11084808.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 55424015 is about 7444.7306868684. The cubic root of 55424015 is about 381.2700234937.

The spelling of 55424015 in words is "fifty-five million, four hundred twenty-four thousand, fifteen".