305221004 has 12 divisors (see below), whose sum is σ = 582694728. Its totient is φ = 138736800.

The previous prime is 305220991. The next prime is 305221039. The reversal of 305221004 is 400122503.

It is a super-2 number, since 2×305221004² = 186319722565536032, 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, 3468377 + ... + 3468464.

It is an arithmetic number, because the mean of its divisors is an integer number (48557894).

Almost surely, 2^305221004 is an apocalyptic number.

It is an amenable number.

305221004 is a deficient number, since it is larger than the sum of its proper divisors (277473724).

305221004 is a wasteful number, since it uses less digits than its factorization.

305221004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6936856 (or 6936854 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 305221004 is about 17470.5753769016. The cubic root of 305221004 is about 673.2940949152.

Adding to 305221004 its reverse (400122503), we get a palindrome (705343507).

The spelling of 305221004 in words is "three hundred five million, two hundred twenty-one thousand, four".