265513038 has 64 divisors (see below), whose sum is σ = 664796160. Its totient is φ = 68931072.

The previous prime is 265513037. The next prime is 265513043. The reversal of 265513038 is 830315562.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265513033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14295 + ... + 27117.

It is an arithmetic number, because the mean of its divisors is an integer number (10387440).

Almost surely, 2^265513038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265513038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332398080).

265513038 is an abundant number, since it is smaller than the sum of its proper divisors (399283122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265513038 is a wasteful number, since it uses less digits than its factorization.

265513038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12881.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 265513038 is about 16294.5708136176. The cubic root of 265513038 is about 642.7300678489.

The spelling of 265513038 in words is "two hundred sixty-five million, five hundred thirteen thousand, thirty-eight".