313023021 has 4 divisors (see below), whose sum is σ = 417364032. Its totient is φ = 208682012.

The previous prime is 313023017. The next prime is 313023047. The reversal of 313023021 is 120320313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 313023021 - 2² = 313023017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313023001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52170501 + ... + 52170506.

It is an arithmetic number, because the mean of its divisors is an integer number (104341008).

Almost surely, 2^313023021 is an apocalyptic number.

It is an amenable number.

313023021 is a deficient number, since it is larger than the sum of its proper divisors (104341011).

313023021 is a wasteful number, since it uses less digits than its factorization.

313023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104341010.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 313023021 is about 17692.4566129184. The cubic root of 313023021 is about 678.9827791136.

Adding to 313023021 its reverse (120320313), we get a palindrome (433343334).

The spelling of 313023021 in words is "three hundred thirteen million, twenty-three thousand, twenty-one".