55555554 has 16 divisors (see below), whose sum is σ = 113208192. Its totient is φ = 18169008.

The previous prime is 55555553. The next prime is 55555559. The reversal of 55555554 is 45555555.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55555553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87034 + ... + 87669.

It is an arithmetic number, because the mean of its divisors is an integer number (7075512).

Almost surely, 2^55555554 is an apocalyptic number.

55555554 is an abundant number, since it is smaller than the sum of its proper divisors (57652638).

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

55555554 is a wasteful number, since it uses less digits than its factorization.

55555554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174761.

The product of its digits is 312500, while the sum is 39.

The square root of 55555554 is about 7453.5598206495. The cubic root of 55555554 is about 381.5714106231.

Subtracting from 55555554 its reverse (45555555), we obtain a palindrome (9999999).

The spelling of 55555554 in words is "fifty-five million, five hundred fifty-five thousand, five hundred fifty-four".