83416251421 has 4 divisors (see below), whose sum is σ = 83425906912. Its totient is φ = 83406595932.

The previous prime is 83416251419. The next prime is 83416251431. The reversal of 83416251421 is 12415261438.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83416251421 - 2¹ = 83416251419 is a prime.

It is a super-2 number, since 2×83416251421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83416251431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4814775 + ... + 4832068.

It is an arithmetic number, because the mean of its divisors is an integer number (20856476728).

Almost surely, 2^83416251421 is an apocalyptic number.

It is an amenable number.

83416251421 is a deficient number, since it is larger than the sum of its proper divisors (9655491).

83416251421 is an equidigital number, since it uses as much as digits as its factorization.

83416251421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655490.

The product of its digits is 46080, while the sum is 37.

The spelling of 83416251421 in words is "eighty-three billion, four hundred sixteen million, two hundred fifty-one thousand, four hundred twenty-one".