263251461 has 16 divisors (see below), whose sum is σ = 391818240. Its totient is φ = 155835120.

The previous prime is 263251433. The next prime is 263251487. The reversal of 263251461 is 164152362.

263251461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 263251461 - 2²² = 259057157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263251361) 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, 91341 + ... + 94178.

It is an arithmetic number, because the mean of its divisors is an integer number (24488640).

Almost surely, 2^263251461 is an apocalyptic number.

It is an amenable number.

263251461 is a deficient number, since it is larger than the sum of its proper divisors (128566779).

263251461 is a wasteful number, since it uses less digits than its factorization.

263251461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185576.

The product of its digits is 8640, while the sum is 30.

The square root of 263251461 is about 16225.0257626914. The cubic root of 263251461 is about 640.8999878848.

Subtracting from 263251461 its reverse (164152362), we obtain a palindrome (99099099).

The spelling of 263251461 in words is "two hundred sixty-three million, two hundred fifty-one thousand, four hundred sixty-one".