55551994 has 16 divisors (see below), whose sum is σ = 86785920. Its totient is φ = 26636400.

The previous prime is 55551989. The next prime is 55552027. The reversal of 55551994 is 49915555.

It is a self number, because there is not a number n which added to its sum of digits gives 55551994.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5587 + ... + 11929.

It is an arithmetic number, because the mean of its divisors is an integer number (5424120).

Almost surely, 2^55551994 is an apocalyptic number.

55551994 is a deficient number, since it is larger than the sum of its proper divisors (31233926).

55551994 is a wasteful number, since it uses less digits than its factorization.

55551994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6525.

The product of its digits is 202500, while the sum is 43.

The square root of 55551994 is about 7453.3210047602. The cubic root of 55551994 is about 381.5632600835.

It can be divided in two parts, 55 and 551994, that added together give a square (552049 = 743²).

The spelling of 55551994 in words is "fifty-five million, five hundred fifty-one thousand, nine hundred ninety-four".