83215470 has 64 divisors (see below), whose sum is σ = 222050304. Its totient is φ = 19820160.

The previous prime is 83215441. The next prime is 83215477. The reversal of 83215470 is 7451238.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83215477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8649 + ... + 15531.

It is an arithmetic number, because the mean of its divisors is an integer number (3469536).

Almost surely, 2^83215470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83215470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111025152).

83215470 is an abundant number, since it is smaller than the sum of its proper divisors (138834834).

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

83215470 is a wasteful number, since it uses less digits than its factorization.

83215470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6937.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 83215470 is about 9122.2513668502. The cubic root of 83215470 is about 436.5842089962.

The spelling of 83215470 in words is "eighty-three million, two hundred fifteen thousand, four hundred seventy".