220489815 has 32 divisors (see below), whose sum is σ = 434198016. Its totient is φ = 93041280.

The previous prime is 220489793. The next prime is 220489823. The reversal of 220489815 is 518984022.

It is not a de Polignac number, because 220489815 - 2⁸ = 220489559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79401 + ... + 82130.

It is an arithmetic number, because the mean of its divisors is an integer number (13568688).

Almost surely, 2^220489815 is an apocalyptic number.

220489815 is a deficient number, since it is larger than the sum of its proper divisors (213708201).

220489815 is a wasteful number, since it uses less digits than its factorization.

220489815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161559.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 220489815 is about 14848.8994541683. The cubic root of 220489815 is about 604.1287598466.

The spelling of 220489815 in words is "two hundred twenty million, four hundred eighty-nine thousand, eight hundred fifteen".