83351821 has 8 divisors (see below), whose sum is σ = 97286400. Its totient is φ = 69924048.

The previous prime is 83351813. The next prime is 83351831. The reversal of 83351821 is 12815338.

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 83351821 - 2³ = 83351813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83351831) 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, 126346 + ... + 127003.

It is an arithmetic number, because the mean of its divisors is an integer number (12160800).

Almost surely, 2^83351821 is an apocalyptic number.

It is an amenable number.

83351821 is a deficient number, since it is larger than the sum of its proper divisors (13934579).

83351821 is a wasteful number, since it uses less digits than its factorization.

83351821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253403.

The product of its digits is 5760, while the sum is 31.

The square root of 83351821 is about 9129.7218468034. The cubic root of 83351821 is about 436.8225309086.

The spelling of 83351821 in words is "eighty-three million, three hundred fifty-one thousand, eight hundred twenty-one".