55435215 has 32 divisors (see below), whose sum is σ = 102456576. Its totient is φ = 25295360.

The previous prime is 55435207. The next prime is 55435229. The reversal of 55435215 is 51253455.

It is a happy number.

It is not a de Polignac number, because 55435215 - 2³ = 55435207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7077 + ... + 12686.

It is an arithmetic number, because the mean of its divisors is an integer number (3201768).

Almost surely, 2^55435215 is an apocalyptic number.

55435215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55435215 is a deficient number, since it is larger than the sum of its proper divisors (47021361).

55435215 is a wasteful number, since it uses less digits than its factorization.

55435215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19799.

The product of its digits is 15000, while the sum is 30.

The square root of 55435215 is about 7445.4828587540. The cubic root of 55435215 is about 381.2957039180.

Subtracting from 55435215 its sum of digits (30), we obtain a triangular number (55435185 = T₁₀₅₂₉).

The spelling of 55435215 in words is "fifty-five million, four hundred thirty-five thousand, two hundred fifteen".