263312725 has 12 divisors (see below), whose sum is σ = 351624196. Its totient is φ = 194446080.

The previous prime is 263312723. The next prime is 263312789. The reversal of 263312725 is 527213362.

It can be written as a sum of positive squares in 6 ways, for example, as 30536676 + 232776049 = 5526^2 + 15257^2 .

It is not a de Polignac number, because 263312725 - 2¹ = 263312723 is a prime.

It is a super-2 number, since 2×263312725² = 138667182293851250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263312723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404772 + ... + 405421.

Almost surely, 2^263312725 is an apocalyptic number.

263312725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

263312725 is a deficient number, since it is larger than the sum of its proper divisors (88311471).

263312725 is a wasteful number, since it uses less digits than its factorization.

263312725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810216 (or 810211 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 263312725 is about 16226.9136005588. The cubic root of 263312725 is about 640.9497008744.

The spelling of 263312725 in words is "two hundred sixty-three million, three hundred twelve thousand, seven hundred twenty-five".