263531025 has 36 divisors (see below), whose sum is σ = 499786092. Its totient is φ = 132280320.

The previous prime is 263531017. The next prime is 263531039. The reversal of 263531025 is 520135362.

263531025 is a `hidden beast` number, since 2 + 635 + 3 + 1 + 0 + 25 = 666.

263531025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 20736 + 263510289 = 144^2 + 16233^2 .

It is not a de Polignac number, because 263531025 - 2³ = 263531017 is a prime.

It is a super-2 number, since 2×263531025² = 138897202275101250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 263531025.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30624 + ... + 38273.

It is an arithmetic number, because the mean of its divisors is an integer number (13882947).

Almost surely, 2^263531025 is an apocalyptic number.

263531025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

263531025 is a deficient number, since it is larger than the sum of its proper divisors (236255067).

263531025 is a wasteful number, since it uses less digits than its factorization.

263531025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68930 (or 68922 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 263531025 is about 16233.6386863821. The cubic root of 263531025 is about 641.1267788726.

Adding to 263531025 its reverse (520135362), we get a palindrome (783666387).

The spelling of 263531025 in words is "two hundred sixty-three million, five hundred thirty-one thousand, twenty-five".