21552034147 has 8 divisors (see below), whose sum is σ = 24632288096. Its totient is φ = 18472128192.

The previous prime is 21552034123. The next prime is 21552034151. The reversal of 21552034147 is 74143025512.

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

It is not a de Polignac number, because 21552034147 - 2²⁷ = 21417816419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21552034157) 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, 62953 + ... + 216949.

It is an arithmetic number, because the mean of its divisors is an integer number (3079036012).

Almost surely, 2^21552034147 is an apocalyptic number.

21552034147 is a deficient number, since it is larger than the sum of its proper divisors (3080253949).

21552034147 is a wasteful number, since it uses less digits than its factorization.

21552034147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173997.

The product of its (nonzero) digits is 33600, while the sum is 34.

Adding to 21552034147 its reverse (74143025512), we get a palindrome (95695059659).

It can be divided in two parts, 2155 and 2034147, that added together give a palindrome (2036302).

The spelling of 21552034147 in words is "twenty-one billion, five hundred fifty-two million, thirty-four thousand, one hundred forty-seven".