55212042 has 16 divisors (see below), whose sum is σ = 110502720. Its totient is φ = 18390912.

The previous prime is 55212011. The next prime is 55212071. The reversal of 55212042 is 24021255.

It is a happy 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, 9978 + ... + 14490.

It is an arithmetic number, because the mean of its divisors is an integer number (6906420).

Almost surely, 2^55212042 is an apocalyptic number.

55212042 is an abundant number, since it is smaller than the sum of its proper divisors (55290678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55212042 is a wasteful number, since it uses less digits than its factorization.

55212042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 55212042 is about 7430.4806035680. The cubic root of 55212042 is about 380.7833379373.

Adding to 55212042 its reverse (24021255), we get a palindrome (79233297).

The spelling of 55212042 in words is "fifty-five million, two hundred twelve thousand, forty-two".