55542222 has 24 divisors (see below), whose sum is σ = 120532464. Its totient is φ = 18484704.

The previous prime is 55542211. The next prime is 55542229. The reversal of 55542222 is 22224555.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55542229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11298 + ... + 15450.

It is an arithmetic number, because the mean of its divisors is an integer number (5022186).

Almost surely, 2^55542222 is an apocalyptic number.

55542222 is an abundant number, since it is smaller than the sum of its proper divisors (64990242).

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

55542222 is a wasteful number, since it uses less digits than its factorization.

55542222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4904 (or 4901 counting only the distinct ones).

The product of its digits is 8000, while the sum is 27.

The square root of 55542222 is about 7452.6654292273. The cubic root of 55542222 is about 381.5408855201.

Adding to 55542222 its reverse (22224555), we get a palindrome (77766777).

It can be divided in two parts, 5554 and 2222, that added together give a 5-th power (7776 = 6⁵).

The spelling of 55542222 in words is "fifty-five million, five hundred forty-two thousand, two hundred twenty-two".