2015220651 has 8 divisors (see below), whose sum is σ = 2759581584. Its totient is φ = 1307170080.

The previous prime is 2015220611. The next prime is 2015220677. The reversal of 2015220651 is 1560225102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2015220651 - 2⁶ = 2015220587 is a prime.

It is a super-2 number, since 2×2015220651² = 8122228544433727602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2015220611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9077460 + ... + 9077681.

It is an arithmetic number, because the mean of its divisors is an integer number (344947698).

Almost surely, 2^2015220651 is an apocalyptic number.

2015220651 is a deficient number, since it is larger than the sum of its proper divisors (744360933).

2015220651 is a wasteful number, since it uses less digits than its factorization.

2015220651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18155181.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2015220651 is about 44891.2090614632. The cubic root of 2015220651 is about 1263.1091125535.

Adding to 2015220651 its reverse (1560225102), we get a palindrome (3575445753).

The spelling of 2015220651 in words is "two billion, fifteen million, two hundred twenty thousand, six hundred fifty-one".