1220542215 has 16 divisors (see below), whose sum is σ = 1970786400. Its totient is φ = 644982912.

The previous prime is 1220542177. The next prime is 1220542231. The reversal of 1220542215 is 5122450221.

It is not a de Polignac number, because 1220542215 - 2¹⁵ = 1220509447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371620 + ... + 374889.

It is an arithmetic number, because the mean of its divisors is an integer number (123174150).

Almost surely, 2^1220542215 is an apocalyptic number.

1220542215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1220542215 is a deficient number, since it is larger than the sum of its proper divisors (750244185).

1220542215 is a wasteful number, since it uses less digits than its factorization.

1220542215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746626.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1220542215 is about 34936.2593160745. The cubic root of 1220542215 is about 1068.6880052956.

Adding to 1220542215 its reverse (5122450221), we get a palindrome (6342992436).

The spelling of 1220542215 in words is "one billion, two hundred twenty million, five hundred forty-two thousand, two hundred fifteen".