55521894 has 8 divisors (see below), whose sum is σ = 111043800. Its totient is φ = 18507296.

The previous prime is 55521887. The next prime is 55521923. The reversal of 55521894 is 49812555.

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

55521894 is an admirable number.

It is a congruent number.

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, 4626819 + ... + 4626830.

It is an arithmetic number, because the mean of its divisors is an integer number (13880475).

Almost surely, 2^55521894 is an apocalyptic number.

55521894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55521894 is a wasteful number, since it uses less digits than its factorization.

55521894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9253654.

The product of its digits is 72000, while the sum is 39.

The square root of 55521894 is about 7451.3014970541. The cubic root of 55521894 is about 381.4943328901.

The spelling of 55521894 in words is "fifty-five million, five hundred twenty-one thousand, eight hundred ninety-four".