400143313 has 4 divisors (see below), whose sum is σ = 409902948. Its totient is φ = 390383680.

The previous prime is 400143311. The next prime is 400143329. The reversal of 400143313 is 313341004.

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 158558464 + 241584849 = 12592^2 + 15543^2 .

It is a cyclic number.

It is not a de Polignac number, because 400143313 - 2¹ = 400143311 is a prime.

It is a super-2 number, since 2×400143313² = 320229341877231938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400143311) 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, 4879756 + ... + 4879837.

It is an arithmetic number, because the mean of its divisors is an integer number (102475737).

Almost surely, 2^400143313 is an apocalyptic number.

It is an amenable number.

400143313 is a deficient number, since it is larger than the sum of its proper divisors (9759635).

400143313 is an equidigital number, since it uses as much as digits as its factorization.

400143313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9759634.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 400143313 is about 20003.5825041416. The cubic root of 400143313 is about 736.8942841555.

Adding to 400143313 its reverse (313341004), we get a palindrome (713484317).

The spelling of 400143313 in words is "four hundred million, one hundred forty-three thousand, three hundred thirteen".