55443615 has 32 divisors (see below), whose sum is σ = 93899520. Its totient is φ = 27857664.

The previous prime is 55443607. The next prime is 55443623. The reversal of 55443615 is 51634455.

It is an interprime number because it is at equal distance from previous prime (55443607) and next prime (55443623).

It is not a de Polignac number, because 55443615 - 2³ = 55443607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64267 + ... + 65123.

It is an arithmetic number, because the mean of its divisors is an integer number (2934360).

Almost surely, 2^55443615 is an apocalyptic number.

55443615 is a deficient number, since it is larger than the sum of its proper divisors (38455905).

55443615 is a wasteful number, since it uses less digits than its factorization.

55443615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its digits is 36000, while the sum is 33.

The square root of 55443615 is about 7446.0469378053. The cubic root of 55443615 is about 381.3149619663.

The spelling of 55443615 in words is "fifty-five million, four hundred forty-three thousand, six hundred fifteen".