531512401 has 4 divisors (see below), whose sum is σ = 607442752. Its totient is φ = 455582052.

The previous prime is 531512393. The next prime is 531512411. The reversal of 531512401 is 104215135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 531512401 - 2³ = 531512393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531512411) 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, 37965165 + ... + 37965178.

It is an arithmetic number, because the mean of its divisors is an integer number (151860688).

Almost surely, 2^531512401 is an apocalyptic number.

It is an amenable number.

531512401 is a deficient number, since it is larger than the sum of its proper divisors (75930351).

531512401 is an equidigital number, since it uses as much as digits as its factorization.

531512401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75930350.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 531512401 is about 23054.5527174135. The cubic root of 531512401 is about 810.0362738417.

Adding to 531512401 its reverse (104215135), we get a palindrome (635727536).

The spelling of 531512401 in words is "five hundred thirty-one million, five hundred twelve thousand, four hundred one".