215483730 has 64 divisors (see below), whose sum is σ = 644779008. Its totient is φ = 44775360.

The previous prime is 215483729. The next prime is 215483791. The reversal of 215483730 is 37384512.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215483691 and 215483700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44332 + ... + 48951.

It is an arithmetic number, because the mean of its divisors is an integer number (10074672).

Almost surely, 2^215483730 is an apocalyptic number.

215483730 is an abundant number, since it is smaller than the sum of its proper divisors (429295278).

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

215483730 is a wasteful number, since it uses less digits than its factorization.

215483730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93311.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 215483730 is about 14679.3640870441. The cubic root of 215483730 is about 599.5215908648.

The spelling of 215483730 in words is "two hundred fifteen million, four hundred eighty-three thousand, seven hundred thirty".