513106403 has 2 divisors, whose sum is σ = 513106404. Its totient is φ = 513106402.

The previous prime is 513106387. The next prime is 513106423. The reversal of 513106403 is 304601315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513106403 - 2⁴ = 513106387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (513106423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256553201 + 256553202.

It is an arithmetic number, because the mean of its divisors is an integer number (256553202).

Almost surely, 2^513106403 is an apocalyptic number.

513106403 is a deficient number, since it is larger than the sum of its proper divisors (1).

513106403 is an equidigital number, since it uses as much as digits as its factorization.

513106403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 513106403 is about 22651.8520876329. The cubic root of 513106403 is about 800.5758369778.

Adding to 513106403 its reverse (304601315), we get a palindrome (817707718).

The spelling of 513106403 in words is "five hundred thirteen million, one hundred six thousand, four hundred three".