263431423 has 4 divisors (see below), whose sum is σ = 263949480. Its totient is φ = 262913368.

The previous prime is 263431417. The next prime is 263431433. The reversal of 263431423 is 324134362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324134362 = 2 ⋅162067181.

It is a cyclic number.

It is not a de Polignac number, because 263431423 - 2¹⁷ = 263300351 is a prime.

It is a super-2 number, since 2×263431423² = 138792229247609858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263431391 and 263431400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263431403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258265 + ... + 259282.

It is an arithmetic number, because the mean of its divisors is an integer number (65987370).

Almost surely, 2^263431423 is an apocalyptic number.

263431423 is a deficient number, since it is larger than the sum of its proper divisors (518057).

263431423 is an equidigital number, since it uses as much as digits as its factorization.

263431423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518056.

The product of its digits is 10368, while the sum is 28.

The square root of 263431423 is about 16230.5706307573. The cubic root of 263431423 is about 641.0459970416.

Adding to 263431423 its reverse (324134362), we get a palindrome (587565785).

The spelling of 263431423 in words is "two hundred sixty-three million, four hundred thirty-one thousand, four hundred twenty-three".