315221222 has 4 divisors (see below), whose sum is σ = 472831836. Its totient is φ = 157610610.

The previous prime is 315221219. The next prime is 315221311. The reversal of 315221222 is 222122513.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 315221194 and 315221203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78805304 + ... + 78805307.

It is an arithmetic number, because the mean of its divisors is an integer number (118207959).

Almost surely, 2^315221222 is an apocalyptic number.

315221222 is a deficient number, since it is larger than the sum of its proper divisors (157610614).

315221222 is a wasteful number, since it uses less digits than its factorization.

315221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157610613.

The product of its digits is 480, while the sum is 20.

The square root of 315221222 is about 17754.4704792906. The cubic root of 315221222 is about 680.5684563188.

Adding to 315221222 its reverse (222122513), we get a palindrome (537343735).

The spelling of 315221222 in words is "three hundred fifteen million, two hundred twenty-one thousand, two hundred twenty-two".