15147219947 has 4 divisors (see below), whose sum is σ = 15499480920. Its totient is φ = 14794958976.

The previous prime is 15147219911. The next prime is 15147219973. The reversal of 15147219947 is 74991274151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74991274151 = 7607 ⋅9858193.

It is a cyclic number.

It is not a de Polignac number, because 15147219947 - 2¹² = 15147215851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15147219895 and 15147219904.

It is not an unprimeable number, because it can be changed into a prime (15147219247) 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, 176130422 + ... + 176130507.

It is an arithmetic number, because the mean of its divisors is an integer number (3874870230).

Almost surely, 2^15147219947 is an apocalyptic number.

15147219947 is a deficient number, since it is larger than the sum of its proper divisors (352260973).

15147219947 is an equidigital number, since it uses as much as digits as its factorization.

15147219947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352260972.

The product of its digits is 635040, while the sum is 50.

The spelling of 15147219947 in words is "fifteen billion, one hundred forty-seven million, two hundred nineteen thousand, nine hundred forty-seven".