521000055 has 12 divisors (see below), whose sum is σ = 903066840. Its totient is φ = 277866672.

The previous prime is 521000033. The next prime is 521000069. The reversal of 521000055 is 550000125.

It is not a de Polignac number, because 521000055 - 2⁶ = 520999991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5788845 + ... + 5788934.

It is an arithmetic number, because the mean of its divisors is an integer number (75255570).

Almost surely, 2^521000055 is an apocalyptic number.

521000055 is a deficient number, since it is larger than the sum of its proper divisors (382066785).

521000055 is a wasteful number, since it uses less digits than its factorization.

521000055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11577790 (or 11577787 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 521000055 is about 22825.4256258235. The cubic root of 521000055 is about 804.6603276123.

The spelling of 521000055 in words is "five hundred twenty-one million, fifty-five", and thus it is an aban number.