402401313 has 6 divisors (see below), whose sum is σ = 581246354. Its totient is φ = 268267536.

The previous prime is 402401257. The next prime is 402401341. The reversal of 402401313 is 313104204.

It can be written as a sum of positive squares in only one way, i.e., 382124304 + 20277009 = 19548^2 + 4503^2 .

It is not a de Polignac number, because 402401313 - 2¹⁰ = 402400289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402401393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22355620 + ... + 22355637.

Almost surely, 2^402401313 is an apocalyptic number.

It is an amenable number.

402401313 is a deficient number, since it is larger than the sum of its proper divisors (178845041).

402401313 is a wasteful number, since it uses less digits than its factorization.

402401313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44711263 (or 44711260 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 402401313 is about 20059.9429959310. The cubic root of 402401313 is about 738.2777778666.

Adding to 402401313 its reverse (313104204), we get a palindrome (715505517).

The spelling of 402401313 in words is "four hundred two million, four hundred one thousand, three hundred thirteen".