55505558 has 8 divisors (see below), whose sum is σ = 84312480. Its totient is φ = 27401400.

The previous prime is 55505557. The next prime is 55505581. The reversal of 55505558 is 85550555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×55505558³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175493 + ... + 175808.

It is an arithmetic number, because the mean of its divisors is an integer number (10539060).

Almost surely, 2^55505558 is an apocalyptic number.

55505558 is a deficient number, since it is larger than the sum of its proper divisors (28806922).

55505558 is a wasteful number, since it uses less digits than its factorization.

55505558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351382.

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

The square root of 55505558 is about 7450.2052320725. The cubic root of 55505558 is about 381.4569140013.

The spelling of 55505558 in words is "fifty-five million, five hundred five thousand, five hundred fifty-eight".