1218152415 has 48 divisors (see below), whose sum is σ = 2077084800. Its totient is φ = 607939200.

The previous prime is 1218152407. The next prime is 1218152417. The reversal of 1218152415 is 5142518121.

It is not a de Polignac number, because 1218152415 - 2³ = 1218152407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218152417) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2907076 + ... + 2907494.

It is an arithmetic number, because the mean of its divisors is an integer number (43272600).

Almost surely, 2^1218152415 is an apocalyptic number.

1218152415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1218152415 is a deficient number, since it is larger than the sum of its proper divisors (858932385).

1218152415 is a wasteful number, since it uses less digits than its factorization.

1218152415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 547 counting only the distinct ones).

The product of its digits is 3200, while the sum is 30.

The square root of 1218152415 is about 34902.0402698753. The cubic root of 1218152415 is about 1067.9900588577.

The spelling of 1218152415 in words is "one billion, two hundred eighteen million, one hundred fifty-two thousand, four hundred fifteen".