525440413 has 4 divisors (see below), whose sum is σ = 525751740. Its totient is φ = 525129088.

The previous prime is 525440411. The next prime is 525440423. The reversal of 525440413 is 314044525.

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 427786489 + 97653924 = 20683^2 + 9882^2 .

It is a cyclic number.

It is not a de Polignac number, because 525440413 - 2¹ = 525440411 is a prime.

It is a super-2 number, since 2×525440413² = 552175255227221138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525440411) 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 3 ways as a sum of consecutive naturals, for example, 153118 + ... + 156511.

It is an arithmetic number, because the mean of its divisors is an integer number (131437935).

Almost surely, 2^525440413 is an apocalyptic number.

It is an amenable number.

525440413 is a deficient number, since it is larger than the sum of its proper divisors (311327).

525440413 is a wasteful number, since it uses less digits than its factorization.

525440413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311326.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 525440413 is about 22922.4870596539. The cubic root of 525440413 is about 806.9398393128.

Adding to 525440413 its reverse (314044525), we get a palindrome (839484938).

The spelling of 525440413 in words is "five hundred twenty-five million, four hundred forty thousand, four hundred thirteen".