55550009213 has 4 divisors (see below), whose sum is σ = 55860344640. Its totient is φ = 55239673788.

The previous prime is 55550009209. The next prime is 55550009231. The reversal of 55550009213 is 31290005555.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31290005555 = 5 ⋅6258001111.

It is a cyclic number.

It is not a de Polignac number, because 55550009213 - 2² = 55550009209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550009233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155167445 + ... + 155167802.

It is an arithmetic number, because the mean of its divisors is an integer number (13965086160).

Almost surely, 2^55550009213 is an apocalyptic number.

It is an amenable number.

55550009213 is a deficient number, since it is larger than the sum of its proper divisors (310335427).

55550009213 is a wasteful number, since it uses less digits than its factorization.

55550009213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310335426.

The product of its (nonzero) digits is 33750, while the sum is 35.

The spelling of 55550009213 in words is "fifty-five billion, five hundred fifty million, nine thousand, two hundred thirteen".