12215537056 has 12 divisors (see below), whose sum is σ = 24049338642. Its totient is φ = 6107768512.

The previous prime is 12215537053. The next prime is 12215537069. The reversal of 12215537056 is 65073551221.

It can be written as a sum of positive squares in only one way, i.e., 12113203600 + 102333456 = 110060^2 + 10116^2 .

It is a super-3 number, since 3×12215537056³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12215537053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190867735 + ... + 190867798.

Almost surely, 2^12215537056 is an apocalyptic number.

12215537056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12215537056 is a deficient number, since it is larger than the sum of its proper divisors (11833801586).

12215537056 is an equidigital number, since it uses as much as digits as its factorization.

12215537056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381735543 (or 381735535 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 12215537056 in words is "twelve billion, two hundred fifteen million, five hundred thirty-seven thousand, fifty-six".