1218152158 has 8 divisors (see below), whose sum is σ = 1832749560. Its totient is φ = 607235640.

The previous prime is 1218152129. The next prime is 1218152191. The reversal of 1218152158 is 8512518121.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919393 + ... + 920716.

It is an arithmetic number, because the mean of its divisors is an integer number (229093695).

Almost surely, 2^1218152158 is an apocalyptic number.

1218152158 is a deficient number, since it is larger than the sum of its proper divisors (614597402).

1218152158 is a wasteful number, since it uses less digits than its factorization.

1218152158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840442.

The product of its digits is 6400, while the sum is 34.

The square root of 1218152158 is about 34902.0365881420. The cubic root of 1218152158 is about 1067.9899837512.

The spelling of 1218152158 in words is "one billion, two hundred eighteen million, one hundred fifty-two thousand, one hundred fifty-eight".