21232272147 has 8 divisors (see below), whose sum is σ = 28344692880. Its totient is φ = 14137349760.

The previous prime is 21232272143. The next prime is 21232272157. The reversal of 21232272147 is 74127223212.

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

It is not a de Polignac number, because 21232272147 - 2² = 21232272143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21232272143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4371754 + ... + 4376607.

It is an arithmetic number, because the mean of its divisors is an integer number (3543086610).

Almost surely, 2^21232272147 is an apocalyptic number.

21232272147 is a deficient number, since it is larger than the sum of its proper divisors (7112420733).

21232272147 is an equidigital number, since it uses as much as digits as its factorization.

21232272147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8749173.

The product of its digits is 18816, while the sum is 33.

Adding to 21232272147 its reverse (74127223212), we get a palindrome (95359495359).

The spelling of 21232272147 in words is "twenty-one billion, two hundred thirty-two million, two hundred seventy-two thousand, one hundred forty-seven".