83051551721 has 8 divisors (see below), whose sum is σ = 86741888640. Its totient is φ = 79437304368.

The previous prime is 83051551717. The next prime is 83051551769. The reversal of 83051551721 is 12715515038.

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

It is a cyclic number.

It is not a de Polignac number, because 83051551721 - 2² = 83051551717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83051551711) 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, 19020161 + ... + 19024526.

It is an arithmetic number, because the mean of its divisors is an integer number (10842736080).

Almost surely, 2^83051551721 is an apocalyptic number.

It is an amenable number.

83051551721 is a deficient number, since it is larger than the sum of its proper divisors (3690336919).

83051551721 is a wasteful number, since it uses less digits than its factorization.

83051551721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38044783.

The product of its (nonzero) digits is 42000, while the sum is 38.

The spelling of 83051551721 in words is "eighty-three billion, fifty-one million, five hundred fifty-one thousand, seven hundred twenty-one".