8551244237921 has 24 divisors (see below), whose sum is σ = 11144960174016. Its totient is φ = 6483217799520.

The previous prime is 8551244237917. The next prime is 8551244237923. The reversal of 8551244237921 is 1297324421558.

It is not a de Polignac number, because 8551244237921 - 2² = 8551244237917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8551244237923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214372181 + ... + 214412066.

It is an arithmetic number, because the mean of its divisors is an integer number (464373340584).

Almost surely, 2^{8551244237921} is an apocalyptic number.

It is an amenable number.

8551244237921 is a deficient number, since it is larger than the sum of its proper divisors (2593715936095).

8551244237921 is a wasteful number, since it uses less digits than its factorization.

8551244237921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428784309 (or 428784302 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 53.

The spelling of 8551244237921 in words is "eight trillion, five hundred fifty-one billion, two hundred forty-four million, two hundred thirty-seven thousand, nine hundred twenty-one".