83256421 has 8 divisors (see below), whose sum is σ = 86796288. Its totient is φ = 79770000.

The previous prime is 83256403. The next prime is 83256431. The reversal of 83256421 is 12465238.

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 83256421 - 2²¹ = 81159269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83256431) 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, 10165 + ... + 16426.

It is an arithmetic number, because the mean of its divisors is an integer number (10849536).

Almost surely, 2^83256421 is an apocalyptic number.

It is an amenable number.

83256421 is a deficient number, since it is larger than the sum of its proper divisors (3539867).

83256421 is a wasteful number, since it uses less digits than its factorization.

83256421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26723.

The product of its digits is 11520, while the sum is 31.

The square root of 83256421 is about 9124.4956572953. The cubic root of 83256421 is about 436.6558127818.

The spelling of 83256421 in words is "eighty-three million, two hundred fifty-six thousand, four hundred twenty-one".