220311404 has 12 divisors (see below), whose sum is σ = 387503424. Its totient is φ = 109596144.

The previous prime is 220311397. The next prime is 220311437. The reversal of 220311404 is 404113022.

It is a super-2 number, since 2×220311404² = 97074229464902432, which contains 22 as substring.

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, 139004 + ... + 140579.

It is an arithmetic number, because the mean of its divisors is an integer number (32291952).

Almost surely, 2^220311404 is an apocalyptic number.

It is an amenable number.

220311404 is a deficient number, since it is larger than the sum of its proper divisors (167192020).

220311404 is a wasteful number, since it uses less digits than its factorization.

220311404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279784 (or 279782 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 220311404 is about 14842.8906888113. The cubic root of 220311404 is about 603.9657707603.

Adding to 220311404 its reverse (404113022), we get a palindrome (624424426).

The spelling of 220311404 in words is "two hundred twenty million, three hundred eleven thousand, four hundred four".