401220313 has 4 divisors (see below), whose sum is σ = 432083428. Its totient is φ = 370357200.

The previous prime is 401220311. The next prime is 401220317. The reversal of 401220313 is 313022104.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 222516889 + 178703424 = 14917^2 + 13368^2 .

It is a cyclic number.

It is not a de Polignac number, because 401220313 - 2¹ = 401220311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401220311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15431538 + ... + 15431563.

It is an arithmetic number, because the mean of its divisors is an integer number (108020857).

Almost surely, 2^401220313 is an apocalyptic number.

It is an amenable number.

401220313 is a deficient number, since it is larger than the sum of its proper divisors (30863115).

401220313 is a wasteful number, since it uses less digits than its factorization.

401220313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30863114.

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

The square root of 401220313 is about 20030.4845922409. The cubic root of 401220313 is about 737.5548176433.

Adding to 401220313 its reverse (313022104), we get a palindrome (714242417).

The spelling of 401220313 in words is "four hundred one million, two hundred twenty thousand, three hundred thirteen".