918220311 has 6 divisors (see below), whose sum is σ = 1326318240. Its totient is φ = 612146868.

The previous prime is 918220307. The next prime is 918220339. The reversal of 918220311 is 113022819.

It is not a de Polignac number, because 918220311 - 2² = 918220307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918220361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51012231 + ... + 51012248.

It is an arithmetic number, because the mean of its divisors is an integer number (221053040).

Almost surely, 2^918220311 is an apocalyptic number.

918220311 is a deficient number, since it is larger than the sum of its proper divisors (408097929).

918220311 is a wasteful number, since it uses less digits than its factorization.

918220311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102024485 (or 102024482 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 918220311 is about 30302.1502702366. The cubic root of 918220311 is about 971.9612816717.

The spelling of 918220311 in words is "nine hundred eighteen million, two hundred twenty thousand, three hundred eleven".