513541403 has 2 divisors, whose sum is σ = 513541404. Its totient is φ = 513541402.

The previous prime is 513541397. The next prime is 513541421. The reversal of 513541403 is 304145315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513541403 - 2⁴ = 513541387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (513541453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256770701 + 256770702.

It is an arithmetic number, because the mean of its divisors is an integer number (256770702).

Almost surely, 2^513541403 is an apocalyptic number.

513541403 is a deficient number, since it is larger than the sum of its proper divisors (1).

513541403 is an equidigital number, since it uses as much as digits as its factorization.

513541403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 513541403 is about 22661.4519172978. The cubic root of 513541403 is about 800.8020097692.

Adding to 513541403 its reverse (304145315), we get a palindrome (817686718).

The spelling of 513541403 in words is "five hundred thirteen million, five hundred forty-one thousand, four hundred three".