525315021 has 32 divisors (see below), whose sum is σ = 919219200. Its totient is φ = 258526080.

The previous prime is 525314987. The next prime is 525315023. The reversal of 525315021 is 120513525.

It is a happy number.

It is not a de Polignac number, because 525315021 - 2¹⁷ = 525183949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 525314982 and 525315000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525315023) 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, 55456 + ... + 64233.

It is an arithmetic number, because the mean of its divisors is an integer number (28725600).

Almost surely, 2^525315021 is an apocalyptic number.

It is an amenable number.

525315021 is a deficient number, since it is larger than the sum of its proper divisors (393904179).

525315021 is a wasteful number, since it uses less digits than its factorization.

525315021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119729.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 525315021 is about 22919.7517656715. The cubic root of 525315021 is about 806.8756443709.

Adding to 525315021 its reverse (120513525), we get a palindrome (645828546).

The spelling of 525315021 in words is "five hundred twenty-five million, three hundred fifteen thousand, twenty-one".