263315403 has 12 divisors (see below), whose sum is σ = 409601920. Its totient is φ = 162040176.

The previous prime is 263315387. The next prime is 263315417. The reversal of 263315403 is 304513362.

It is a happy number.

It is not a de Polignac number, because 263315403 - 2⁴ = 263315387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263315443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1125163 + ... + 1125396.

Almost surely, 2^263315403 is an apocalyptic number.

263315403 is a deficient number, since it is larger than the sum of its proper divisors (146286517).

263315403 is a wasteful number, since it uses less digits than its factorization.

263315403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250578 (or 2250575 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 263315403 is about 16226.9961175813. The cubic root of 263315403 is about 640.9518737754.

Adding to 263315403 its reverse (304513362), we get a palindrome (567828765).

The spelling of 263315403 in words is "two hundred sixty-three million, three hundred fifteen thousand, four hundred three".