263432243 has 4 divisors (see below), whose sum is σ = 263758680. Its totient is φ = 263105808.

The previous prime is 263432237. The next prime is 263432249. The reversal of 263432243 is 342234362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342234362 = 2 ⋅171117181.

It is an interprime number because it is at equal distance from previous prime (263432237) and next prime (263432249).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263432243 is a prime.

It is a super-2 number, since 2×263432243² = 138793093304022098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263432249) 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, 162005 + ... + 163622.

It is an arithmetic number, because the mean of its divisors is an integer number (65939670).

Almost surely, 2^263432243 is an apocalyptic number.

263432243 is a deficient number, since it is larger than the sum of its proper divisors (326437).

263432243 is an equidigital number, since it uses as much as digits as its factorization.

263432243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326436.

The product of its digits is 20736, while the sum is 29.

The square root of 263432243 is about 16230.5958917102. The cubic root of 263432243 is about 641.0466621827.

The spelling of 263432243 in words is "two hundred sixty-three million, four hundred thirty-two thousand, two hundred forty-three".