55215416 has 32 divisors (see below), whose sum is σ = 105636960. Its totient is φ = 27052032.

The previous prime is 55215389. The next prime is 55215421. The reversal of 55215416 is 61451255.

It is a happy number.

It is a super-3 number, since 3×55215416³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92816 + ... + 93408.

It is an arithmetic number, because the mean of its divisors is an integer number (3301155).

Almost surely, 2^55215416 is an apocalyptic number.

It is an amenable number.

55215416 is a deficient number, since it is larger than the sum of its proper divisors (50421544).

55215416 is a wasteful number, since it uses less digits than its factorization.

55215416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 811 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 55215416 is about 7430.7076379037. The cubic root of 55215416 is about 380.7910943178.

The spelling of 55215416 in words is "fifty-five million, two hundred fifteen thousand, four hundred sixteen".