313222021 has 8 divisors (see below), whose sum is σ = 361659200. Its totient is φ = 265707648.

The previous prime is 313222003. The next prime is 313222031. The reversal of 313222021 is 120222313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 313222021 - 2⁷ = 313221893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313221986 and 313222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313222031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229971 + ... + 231328.

It is an arithmetic number, because the mean of its divisors is an integer number (45207400).

Almost surely, 2^313222021 is an apocalyptic number.

It is an amenable number.

313222021 is a deficient number, since it is larger than the sum of its proper divisors (48437179).

313222021 is an equidigital number, since it uses as much as digits as its factorization.

313222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461403.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 313222021 is about 17698.0795850849. The cubic root of 313222021 is about 679.1266332298.

Adding to 313222021 its reverse (120222313), we get a palindrome (433444334).

The spelling of 313222021 in words is "three hundred thirteen million, two hundred twenty-two thousand, twenty-one".