5555212521 has 4 divisors (see below), whose sum is σ = 7406950032. Its totient is φ = 3703475012.

The previous prime is 5555212511. The next prime is 5555212529. The reversal of 5555212521 is 1252125555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5555212521 - 2⁵ = 5555212489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5555212529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925868751 + ... + 925868756.

It is an arithmetic number, because the mean of its divisors is an integer number (1851737508).

Almost surely, 2^5555212521 is an apocalyptic number.

It is an amenable number.

5555212521 is a deficient number, since it is larger than the sum of its proper divisors (1851737511).

5555212521 is a wasteful number, since it uses less digits than its factorization.

5555212521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851737510.

The product of its digits is 25000, while the sum is 33.

The square root of 5555212521 is about 74533.2980687156. The cubic root of 5555212521 is about 1771.0611616931.

The spelling of 5555212521 in words is "five billion, five hundred fifty-five million, two hundred twelve thousand, five hundred twenty-one".