55642422 has 16 divisors (see below), whose sum is σ = 121401792. Its totient is φ = 16861320.

The previous prime is 55642417. The next prime is 55642423. The reversal of 55642422 is 22424655.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55642422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55642423) by changing a digit.

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, 421468 + ... + 421599.

It is an arithmetic number, because the mean of its divisors is an integer number (7587612).

Almost surely, 2^55642422 is an apocalyptic number.

55642422 is an abundant number, since it is smaller than the sum of its proper divisors (65759370).

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

55642422 is a wasteful number, since it uses less digits than its factorization.

55642422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843083.

The product of its digits is 19200, while the sum is 30.

The square root of 55642422 is about 7459.3848271825. The cubic root of 55642422 is about 381.7701851336.

The spelling of 55642422 in words is "fifty-five million, six hundred forty-two thousand, four hundred twenty-two".