525402013 has 4 divisors (see below), whose sum is σ = 526276828. Its totient is φ = 524527200.

The previous prime is 525402011. The next prime is 525402029. The reversal of 525402013 is 310204525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 468203044 + 57198969 = 21638^2 + 7563^2 .

It is a cyclic number.

It is not a de Polignac number, because 525402013 - 2¹ = 525402011 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 (525402011) 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, 436506 + ... + 437707.

It is an arithmetic number, because the mean of its divisors is an integer number (131569207).

Almost surely, 2^525402013 is an apocalyptic number.

It is an amenable number.

525402013 is a deficient number, since it is larger than the sum of its proper divisors (874815).

525402013 is an equidigital number, since it uses as much as digits as its factorization.

525402013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874814.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 525402013 is about 22921.6494389038. The cubic root of 525402013 is about 806.9201813624.

Adding to 525402013 its reverse (310204525), we get a palindrome (835606538).

The spelling of 525402013 in words is "five hundred twenty-five million, four hundred two thousand, thirteen".