263304431 has 8 divisors (see below), whose sum is σ = 283862544. Its totient is φ = 242789760.

The previous prime is 263304409. The next prime is 263304473. The reversal of 263304431 is 134403362.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263304431 - 2²⁶ = 196195567 is a prime.

It is a super-2 number, since 2×263304431² = 138658446768467522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263304431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263304491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336 + ... + 23066.

It is an arithmetic number, because the mean of its divisors is an integer number (35482818).

Almost surely, 2^263304431 is an apocalyptic number.

263304431 is a deficient number, since it is larger than the sum of its proper divisors (20558113).

263304431 is a wasteful number, since it uses less digits than its factorization.

263304431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21721.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 263304431 is about 16226.6580354674. The cubic root of 263304431 is about 640.9429711166.

Adding to 263304431 its reverse (134403362), we get a palindrome (397707793).

The spelling of 263304431 in words is "two hundred sixty-three million, three hundred four thousand, four hundred thirty-one".