1218152451 has 8 divisors (see below), whose sum is σ = 1624708800. Its totient is φ = 811848872.

The previous prime is 1218152449. The next prime is 1218152483. The reversal of 1218152451 is 1542518121.

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

It is a cyclic number.

It is not a de Polignac number, because 1218152451 - 2¹ = 1218152449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218156451) 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 in 7 ways as a sum of consecutive naturals, for example, 51645 + ... + 71438.

It is an arithmetic number, because the mean of its divisors is an integer number (203088600).

Almost surely, 2^1218152451 is an apocalyptic number.

1218152451 is a deficient number, since it is larger than the sum of its proper divisors (406556349).

1218152451 is a wasteful number, since it uses less digits than its factorization.

1218152451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126385.

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

The square root of 1218152451 is about 34902.0407856045. The cubic root of 1218152451 is about 1067.9900693784.

The spelling of 1218152451 in words is "one billion, two hundred eighteen million, one hundred fifty-two thousand, four hundred fifty-one".