21551683002317 has 12 divisors (see below), whose sum is σ = 23355106467264. Its totient is φ = 19878451379280.

The previous prime is 21551683002301. The next prime is 21551683002329. The reversal of 21551683002317 is 71320038615512.

It is not a de Polignac number, because 21551683002317 - 2⁴ = 21551683002301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21551683002217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49171733 + ... + 49608090.

It is an arithmetic number, because the mean of its divisors is an integer number (1946258872272).

Almost surely, 2^{21551683002317} is an apocalyptic number.

It is an amenable number.

21551683002317 is a deficient number, since it is larger than the sum of its proper divisors (1803423464947).

21551683002317 is a wasteful number, since it uses less digits than its factorization.

21551683002317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98781140 (or 98781127 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 21551683002317 in words is "twenty-one trillion, five hundred fifty-one billion, six hundred eighty-three million, two thousand, three hundred seventeen".