513022403 has 2 divisors, whose sum is σ = 513022404. Its totient is φ = 513022402.

The previous prime is 513022387. The next prime is 513022423. The reversal of 513022403 is 304220315.

It is a happy number.

It is an a-pointer prime, because the next prime (513022423) can be obtained adding 513022403 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513022403 - 2⁴ = 513022387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (513022423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256511201 + 256511202.

It is an arithmetic number, because the mean of its divisors is an integer number (256511202).

Almost surely, 2^513022403 is an apocalyptic number.

513022403 is a deficient number, since it is larger than the sum of its proper divisors (1).

513022403 is an equidigital number, since it uses as much as digits as its factorization.

513022403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 513022403 is about 22649.9978587195. The cubic root of 513022403 is about 800.5321475078.

Adding to 513022403 its reverse (304220315), we get a palindrome (817242718).

The spelling of 513022403 in words is "five hundred thirteen million, twenty-two thousand, four hundred three".