263256415 has 4 divisors (see below), whose sum is σ = 315907704. Its totient is φ = 210605128.

The previous prime is 263256397. The next prime is 263256451. The reversal of 263256415 is 514652362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 263256415 - 2⁹ = 263255903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 26325637 + ... + 26325646.

It is an arithmetic number, because the mean of its divisors is an integer number (78976926).

Almost surely, 2^263256415 is an apocalyptic number.

263256415 is a deficient number, since it is larger than the sum of its proper divisors (52651289).

263256415 is an equidigital number, since it uses as much as digits as its factorization.

263256415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52651288.

The product of its digits is 43200, while the sum is 34.

The square root of 263256415 is about 16225.1784273702. The cubic root of 263256415 is about 640.9040081204.

The spelling of 263256415 in words is "two hundred sixty-three million, two hundred fifty-six thousand, four hundred fifteen".