525440231 has 8 divisors (see below), whose sum is σ = 553450800. Its totient is φ = 497465280.

The previous prime is 525440207. The next prime is 525440249. The reversal of 525440231 is 132044525.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 525440231 - 2¹⁰ = 525439207 is a prime.

It is a super-2 number, since 2×525440231² = 552174872706666722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 525440231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525440261) 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 7 ways as a sum of consecutive naturals, for example, 24665 + ... + 40733.

It is an arithmetic number, because the mean of its divisors is an integer number (69181350).

Almost surely, 2^525440231 is an apocalyptic number.

525440231 is a deficient number, since it is larger than the sum of its proper divisors (28010569).

525440231 is a wasteful number, since it uses less digits than its factorization.

525440231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17809.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 525440231 is about 22922.4830897527. The cubic root of 525440231 is about 806.9397461446.

Adding to 525440231 its reverse (132044525), we get a palindrome (657484756).

The spelling of 525440231 in words is "five hundred twenty-five million, four hundred forty thousand, two hundred thirty-one".