525503261 has 4 divisors (see below), whose sum is σ = 529284000. Its totient is φ = 521722524.

The previous prime is 525503257. The next prime is 525503317. The reversal of 525503261 is 162305525.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 525503261 - 2² = 525503257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525503161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1890161 + ... + 1890438.

It is an arithmetic number, because the mean of its divisors is an integer number (132321000).

Almost surely, 2^525503261 is an apocalyptic number.

It is an amenable number.

525503261 is a deficient number, since it is larger than the sum of its proper divisors (3780739).

525503261 is a wasteful number, since it uses less digits than its factorization.

525503261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780738.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 525503261 is about 22923.8578995770. The cubic root of 525503261 is about 806.9720107585.

Adding to 525503261 its reverse (162305525), we get a palindrome (687808786).

The spelling of 525503261 in words is "five hundred twenty-five million, five hundred three thousand, two hundred sixty-one".