55533915 has 24 divisors (see below), whose sum is σ = 96456048. Its totient is φ = 29557440.

The previous prime is 55533899. The next prime is 55533923. The reversal of 55533915 is 51933555.

It is not a de Polignac number, because 55533915 - 2⁴ = 55533899 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 55533915.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28812 + ... + 30678.

It is an arithmetic number, because the mean of its divisors is an integer number (4019002).

Almost surely, 2^55533915 is an apocalyptic number.

55533915 is a deficient number, since it is larger than the sum of its proper divisors (40922133).

55533915 is a wasteful number, since it uses less digits than its factorization.

55533915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539 (or 2536 counting only the distinct ones).

The product of its digits is 50625, while the sum is 36.

The square root of 55533915 is about 7452.1080910035. The cubic root of 55533915 is about 381.5218632457.

The spelling of 55533915 in words is "fifty-five million, five hundred thirty-three thousand, nine hundred fifteen".