1521000055 has 8 divisors (see below), whose sum is σ = 1828051344. Its totient is φ = 1214899200.

The previous prime is 1521000029. The next prime is 1521000067. The reversal of 1521000055 is 5500001251.

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

It is not a de Polignac number, because 1521000055 - 2⁵ = 1521000023 is a prime.

It is a super-3 number, since 3×1521000055³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1520999996 and 1521000041.

It is a congruent number.

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, 234081 + ... + 240490.

It is an arithmetic number, because the mean of its divisors is an integer number (228506418).

Almost surely, 2^1521000055 is an apocalyptic number.

1521000055 is a deficient number, since it is larger than the sum of its proper divisors (307051289).

1521000055 is an equidigital number, since it uses as much as digits as its factorization.

1521000055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475217.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 1521000055 is about 39000.0007051282. Note that the first 3 decimals coincide. The cubic root of 1521000055 is about 1150.0315189849.

The spelling of 1521000055 in words is "one billion, five hundred twenty-one million, fifty-five", and thus it is an aban number.