83215290 has 16 divisors (see below), whose sum is σ = 199716768. Its totient is φ = 22190736.

The previous prime is 83215271. The next prime is 83215309. The reversal of 83215290 is 9251238.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (83215271) and next prime (83215309).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2773843 = 83215290 / (8 + 3 + 2 + 1 + 5 + 2 + 9 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386892 + ... + 1386951.

It is an arithmetic number, because the mean of its divisors is an integer number (12482298).

Almost surely, 2^83215290 is an apocalyptic number.

83215290 is an abundant number, since it is smaller than the sum of its proper divisors (116501478).

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

83215290 is a wasteful number, since it uses less digits than its factorization.

83215290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773853.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 83215290 is about 9122.2415008593. The cubic root of 83215290 is about 436.5838942101.

The spelling of 83215290 in words is "eighty-three million, two hundred fifteen thousand, two hundred ninety".