218856251147 has 8 divisors (see below), whose sum is σ = 221723673600. Its totient is φ = 215991256104.

The previous prime is 218856251143. The next prime is 218856251161. The reversal of 218856251147 is 741152658812.

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 218856251147 - 2² = 218856251143 is a prime.

It is a super-2 number, since 2×218856251147² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218856251095 and 218856251104.

It is not an unprimeable number, because it can be changed into a prime (218856251143) 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, 424997 + ... + 786342.

It is an arithmetic number, because the mean of its divisors is an integer number (27715459200).

Almost surely, 2^218856251147 is an apocalyptic number.

218856251147 is a deficient number, since it is larger than the sum of its proper divisors (2867422453).

218856251147 is a wasteful number, since it uses less digits than its factorization.

218856251147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213705.

The product of its digits is 1075200, while the sum is 50.

The spelling of 218856251147 in words is "two hundred eighteen billion, eight hundred fifty-six million, two hundred fifty-one thousand, one hundred forty-seven".