55215802 has 8 divisors (see below), whose sum is σ = 82862676. Its totient is φ = 27594912.

The previous prime is 55215781. The next prime is 55215817. The reversal of 55215802 is 20851255.

55215802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 48038761 + 7177041 = 6931^2 + 2679^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198 + ... + 10510.

Almost surely, 2^55215802 is an apocalyptic number.

55215802 is a deficient number, since it is larger than the sum of its proper divisors (27646874).

55215802 is a wasteful number, since it uses less digits than its factorization.

55215802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12992.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 55215802 is about 7430.7336111585. The cubic root of 55215802 is about 380.7919816607.

The spelling of 55215802 in words is "fifty-five million, two hundred fifteen thousand, eight hundred two".