1215110656 has 20 divisors (see below), whose sum is σ = 2427849072. Its totient is φ = 607555072.

The previous prime is 1215110639. The next prime is 1215110657. The reversal of 1215110656 is 6560115121.

It is a happy number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215110657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1186120 + ... + 1187143.

Almost surely, 2^1215110656 is an apocalyptic number.

1215110656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1215110656 is a deficient number, since it is larger than the sum of its proper divisors (1212738416).

1215110656 is an frugal number, since it uses more digits than its factorization.

1215110656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373281 (or 2373265 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1215110656 is about 34858.4373717469. The cubic root of 1215110656 is about 1067.1003847328.

Adding to 1215110656 its reverse (6560115121), we get a palindrome (7775225777).

The spelling of 1215110656 in words is "one billion, two hundred fifteen million, one hundred ten thousand, six hundred fifty-six".