55505506 has 8 divisors (see below), whose sum is σ = 95152320. Its totient is φ = 23788068.

The previous prime is 55505497. The next prime is 55505519. The reversal of 55505506 is 60550555.

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

It is a super-2 number, since 2×55505506² = 6161722392632072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1982326 + ... + 1982353.

It is an arithmetic number, because the mean of its divisors is an integer number (11894040).

Almost surely, 2^55505506 is an apocalyptic number.

55505506 is a deficient number, since it is larger than the sum of its proper divisors (39646814).

55505506 is a wasteful number, since it uses less digits than its factorization.

55505506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964688.

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 55505506 is about 7450.2017422349. The cubic root of 55505506 is about 381.4567948795.

The spelling of 55505506 in words is "fifty-five million, five hundred five thousand, five hundred six".