1220032615 has 4 divisors (see below), whose sum is σ = 1464039144. Its totient is φ = 976026088.

The previous prime is 1220032609. The next prime is 1220032633. The reversal of 1220032615 is 5162300221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5162300221 = 13 ⋅397100017.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220032615 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122003257 + ... + 122003266.

It is an arithmetic number, because the mean of its divisors is an integer number (366009786).

Almost surely, 2^1220032615 is an apocalyptic number.

1220032615 is a deficient number, since it is larger than the sum of its proper divisors (244006529).

1220032615 is an equidigital number, since it uses as much as digits as its factorization.

1220032615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244006528.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1220032615 is about 34928.9652723925. The cubic root of 1220032615 is about 1068.5392519485.

Adding to 1220032615 its reverse (5162300221), we get a palindrome (6382332836).

The spelling of 1220032615 in words is "one billion, two hundred twenty million, thirty-two thousand, six hundred fifteen".