1215550113 has 8 divisors (see below), whose sum is σ = 1644923808. Its totient is φ = 798271584.

The previous prime is 1215550043. The next prime is 1215550121. The reversal of 1215550113 is 3110555121.

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

It is not a de Polignac number, because 1215550113 - 2¹⁴ = 1215533729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215550313) 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, 3023556 + ... + 3023957.

It is an arithmetic number, because the mean of its divisors is an integer number (205615476).

Almost surely, 2^1215550113 is an apocalyptic number.

It is an amenable number.

1215550113 is a deficient number, since it is larger than the sum of its proper divisors (429373695).

1215550113 is an equidigital number, since it uses as much as digits as its factorization.

1215550113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047583.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1215550113 is about 34864.7402543028. The cubic root of 1215550113 is about 1067.2290117595.

The spelling of 1215550113 in words is "one billion, two hundred fifteen million, five hundred fifty thousand, one hundred thirteen".