263264431 has 16 divisors (see below), whose sum is σ = 292654080. Its totient is φ = 235693440.

The previous prime is 263264413. The next prime is 263264459. The reversal of 263264431 is 134462362.

It is not a de Polignac number, because 263264431 - 2¹³ = 263256239 is a prime.

It is a super-2 number, since 2×263264431² = 138616321259507522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263264393 and 263264402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263264411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26860 + ... + 35326.

It is an arithmetic number, because the mean of its divisors is an integer number (18290880).

Almost surely, 2^263264431 is an apocalyptic number.

263264431 is a deficient number, since it is larger than the sum of its proper divisors (29389649).

263264431 is a wasteful number, since it uses less digits than its factorization.

263264431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8574.

The product of its digits is 20736, while the sum is 31.

The square root of 263264431 is about 16225.4254489674. The cubic root of 263264431 is about 640.9105131019.

The spelling of 263264431 in words is "two hundred sixty-three million, two hundred sixty-four thousand, four hundred thirty-one".