525440423 has 2 divisors, whose sum is σ = 525440424. Its totient is φ = 525440422.

The previous prime is 525440411. The next prime is 525440431. The reversal of 525440423 is 324044525.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 525440423 - 2⁴ = 525440407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525440623) 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 as a sum of consecutive naturals, namely, 262720211 + 262720212.

It is an arithmetic number, because the mean of its divisors is an integer number (262720212).

Almost surely, 2^525440423 is an apocalyptic number.

525440423 is a deficient number, since it is larger than the sum of its proper divisors (1).

525440423 is an equidigital number, since it uses as much as digits as its factorization.

525440423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 525440423 is about 22922.4872777803. The cubic root of 525440423 is about 806.9398444319.

Adding to 525440423 its reverse (324044525), we get a palindrome (849484948).

The spelling of 525440423 in words is "five hundred twenty-five million, four hundred forty thousand, four hundred twenty-three".