83221425 has 144 divisors (see below), whose sum is σ = 187765760. Its totient is φ = 35691840.

The previous prime is 83221403. The next prime is 83221427. The reversal of 83221425 is 52412238.

It is not a de Polignac number, because 83221425 - 2⁵ = 83221393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (83221427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 807924 + ... + 808026.

Almost surely, 2^83221425 is an apocalyptic number.

It is an amenable number.

83221425 is an abundant number, since it is smaller than the sum of its proper divisors (104544335).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83221425 is a wasteful number, since it uses less digits than its factorization.

83221425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 137 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 83221425 is about 9122.5777606990. The cubic root of 83221425 is about 436.5946229130.

The spelling of 83221425 in words is "eighty-three million, two hundred twenty-one thousand, four hundred twenty-five".