2115222461656 has 16 divisors (see below), whose sum is σ = 3980676961440. Its totient is φ = 1053708605280.

The previous prime is 2115222461621. The next prime is 2115222461659. The reversal of 2115222461656 is 6561642225112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115222461659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487825891 + ... + 487830226.

It is an arithmetic number, because the mean of its divisors is an integer number (248792310090).

Almost surely, 2^{2115222461656} is an apocalyptic number.

It is an amenable number.

2115222461656 is a deficient number, since it is larger than the sum of its proper divisors (1865454499784).

2115222461656 is a wasteful number, since it uses less digits than its factorization.

2115222461656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975656394 (or 975656390 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

Adding to 2115222461656 its reverse (6561642225112), we get a palindrome (8676864686768).

The spelling of 2115222461656 in words is "two trillion, one hundred fifteen billion, two hundred twenty-two million, four hundred sixty-one thousand, six hundred fifty-six".