400205052123313 has 4 divisors (see below), whose sum is σ = 400399988828788. Its totient is φ = 400010115417840.

The previous prime is 400205052123311. The next prime is 400205052123407. The reversal of 400205052123313 is 313321250502004.

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 228112449905664 + 172092602217649 = 15103392^2 + 13118407^2 .

It is a cyclic number.

It is not a de Polignac number, because 400205052123313 - 2¹ = 400205052123311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400205052123311) 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, 97468349658 + ... + 97468353763.

It is an arithmetic number, because the mean of its divisors is an integer number (100099997207197).

Almost surely, 2^{400205052123313} is an apocalyptic number.

It is an amenable number.

400205052123313 is a deficient number, since it is larger than the sum of its proper divisors (194936705475).

400205052123313 is a wasteful number, since it uses less digits than its factorization.

400205052123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194936705474.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 400205052123313 in words is "four hundred trillion, two hundred five billion, fifty-two million, one hundred twenty-three thousand, three hundred thirteen".