55550558 has 16 divisors (see below), whose sum is σ = 95386464. Its totient is φ = 23768160.

The previous prime is 55550557. The next prime is 55550587. The reversal of 55550558 is 85505555.

It is a super-3 number, since 3×55550558³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550557) 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, 6548 + ... + 12408.

It is an arithmetic number, because the mean of its divisors is an integer number (5961654).

Almost surely, 2^55550558 is an apocalyptic number.

55550558 is a deficient number, since it is larger than the sum of its proper divisors (39835906).

55550558 is a wasteful number, since it uses less digits than its factorization.

55550558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547.

The product of its (nonzero) digits is 125000, while the sum is 38.

The square root of 55550558 is about 7453.2246712413. The cubic root of 55550558 is about 381.5599722953.

The spelling of 55550558 in words is "fifty-five million, five hundred fifty thousand, five hundred fifty-eight".