15213549955 has 8 divisors (see below), whose sum is σ = 18259470000. Its totient is φ = 12168699936.

The previous prime is 15213549947. The next prime is 15213549979. The reversal of 15213549955 is 55994531251.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 15213549955 - 2³ = 15213549947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15213549899 and 15213549908.

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, 235885 + ... + 293374.

It is an arithmetic number, because the mean of its divisors is an integer number (2282433750).

Almost surely, 2^15213549955 is an apocalyptic number.

15213549955 is a deficient number, since it is larger than the sum of its proper divisors (3045920045).

15213549955 is an equidigital number, since it uses as much as digits as its factorization.

15213549955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535013.

The product of its digits is 1215000, while the sum is 49.

The spelling of 15213549955 in words is "fifteen billion, two hundred thirteen million, five hundred forty-nine thousand, nine hundred fifty-five".