402031443313 has 4 divisors (see below), whose sum is σ = 402230766820. Its totient is φ = 401832119808.

The previous prime is 402031443311. The next prime is 402031443389. The reversal of 402031443313 is 313344130204.

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 172961996769 + 229069446544 = 415887^2 + 478612^2 .

It is a cyclic number.

It is not a de Polignac number, because 402031443313 - 2¹ = 402031443311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402031443311) 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, 99658728 + ... + 99662761.

It is an arithmetic number, because the mean of its divisors is an integer number (100557691705).

Almost surely, 2^402031443313 is an apocalyptic number.

It is an amenable number.

402031443313 is a deficient number, since it is larger than the sum of its proper divisors (199323507).

402031443313 is a wasteful number, since it uses less digits than its factorization.

402031443313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199323506.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 402031443313 its reverse (313344130204), we get a palindrome (715375573517).

The spelling of 402031443313 in words is "four hundred two billion, thirty-one million, four hundred forty-three thousand, three hundred thirteen".