55642210 has 32 divisors (see below), whose sum is σ = 111347712. Its totient is φ = 19880640.

The previous prime is 55642193. The next prime is 55642231. The reversal of 55642210 is 1224655.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2874 + ... + 10933.

It is an arithmetic number, because the mean of its divisors is an integer number (3479616).

Almost surely, 2^55642210 is an apocalyptic number.

55642210 is an abundant number, since it is smaller than the sum of its proper divisors (55705502).

55642210 is a wasteful number, since it uses less digits than its factorization.

55642210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13858.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 55642210 is about 7459.3706168818. The cubic root of 55642210 is about 381.7697002794.

Adding to 55642210 its reverse (1224655), we get a palindrome (56866865).

The spelling of 55642210 in words is "fifty-five million, six hundred forty-two thousand, two hundred ten".