402206513 has 4 divisors (see below), whose sum is σ = 402246900. Its totient is φ = 402166128.

The previous prime is 402206491. The next prime is 402206521. The reversal of 402206513 is 315602204.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 379003024 + 23203489 = 19468^2 + 4817^2 .

It is a cyclic number.

It is not a de Polignac number, because 402206513 - 2¹² = 402202417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402206813) 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, 6563 + ... + 29111.

It is an arithmetic number, because the mean of its divisors is an integer number (100561725).

Almost surely, 2^402206513 is an apocalyptic number.

It is an amenable number.

402206513 is a deficient number, since it is larger than the sum of its proper divisors (40387).

402206513 is a wasteful number, since it uses less digits than its factorization.

402206513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40386.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 402206513 is about 20055.0869606691. The cubic root of 402206513 is about 738.1586267277.

Adding to 402206513 its reverse (315602204), we get a palindrome (717808717).

The spelling of 402206513 in words is "four hundred two million, two hundred six thousand, five hundred thirteen".