2015220656 has 10 divisors (see below), whose sum is σ = 3904490052. Its totient is φ = 1007610320.

The previous prime is 2015220611. The next prime is 2015220677. The reversal of 2015220656 is 6560225102.

It is a super-2 number, since 2×2015220656² = 8122228584738140672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62975630 + ... + 62975661.

Almost surely, 2^2015220656 is an apocalyptic number.

It is an amenable number.

2015220656 is a deficient number, since it is larger than the sum of its proper divisors (1889269396).

2015220656 is a wasteful number, since it uses less digits than its factorization.

2015220656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125951299 (or 125951293 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2015220656 is about 44891.2091171534. The cubic root of 2015220656 is about 1263.1091135981.

Adding to 2015220656 its reverse (6560225102), we get a palindrome (8575445758).

The spelling of 2015220656 in words is "two billion, fifteen million, two hundred twenty thousand, six hundred fifty-six".