218958956 has 6 divisors (see below), whose sum is σ = 383178180. Its totient is φ = 109479476.

The previous prime is 218958941. The next prime is 218959009. The reversal of 218958956 is 659859812.

It is a junction number, because it is equal to n+sod(n) for n = 218958898 and 218958907.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27369866 + ... + 27369873.

It is an arithmetic number, because the mean of its divisors is an integer number (63863030).

Almost surely, 2^218958956 is an apocalyptic number.

It is an amenable number.

218958956 is a deficient number, since it is larger than the sum of its proper divisors (164219224).

218958956 is a wasteful number, since it uses less digits than its factorization.

218958956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54739743 (or 54739741 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 53.

The square root of 218958956 is about 14797.2617737202. The cubic root of 218958956 is about 602.7273578216.

The spelling of 218958956 in words is "two hundred eighteen million, nine hundred fifty-eight thousand, nine hundred fifty-six".