313441021 has 4 divisors (see below), whose sum is σ = 313490812. Its totient is φ = 313391232.

The previous prime is 313441003. The next prime is 313441057. The reversal of 313441021 is 120144313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120144313 = 31 ⋅3875623.

It can be written as a sum of positive squares in 2 ways, for example, as 115025625 + 198415396 = 10725^2 + 14086^2 .

It is a cyclic number.

It is not a de Polignac number, because 313441021 - 2⁵ = 313440989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 313441021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313441621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13806 + ... + 28591.

It is an arithmetic number, because the mean of its divisors is an integer number (78372703).

Almost surely, 2^313441021 is an apocalyptic number.

It is an amenable number.

313441021 is a deficient number, since it is larger than the sum of its proper divisors (49791).

313441021 is an equidigital number, since it uses as much as digits as its factorization.

313441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49790.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 313441021 is about 17704.2656159469. The cubic root of 313441021 is about 679.2848746403.

Adding to 313441021 its reverse (120144313), we get a palindrome (433585334).

The spelling of 313441021 in words is "three hundred thirteen million, four hundred forty-one thousand, twenty-one".