55440015 has 8 divisors (see below), whose sum is σ = 88704048. Its totient is φ = 29568000.

The previous prime is 55440013. The next prime is 55440031. The reversal of 55440015 is 51004455.

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

It is not a de Polignac number, because 55440015 - 2¹ = 55440013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55440013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847986 + ... + 1848015.

It is an arithmetic number, because the mean of its divisors is an integer number (11088006).

Almost surely, 2^55440015 is an apocalyptic number.

55440015 is a deficient number, since it is larger than the sum of its proper divisors (33264033).

55440015 is a wasteful number, since it uses less digits than its factorization.

55440015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696009.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 55440015 is about 7445.8051948732. The cubic root of 55440015 is about 381.3067087552.

The spelling of 55440015 in words is "fifty-five million, four hundred forty thousand, fifteen".