531511422401 has 4 divisors (see below), whose sum is σ = 531706905600. Its totient is φ = 531315939204.

The previous prime is 531511422319. The next prime is 531511422457. The reversal of 531511422401 is 104224115135.

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 531511422401 - 2²² = 531507228097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531511922401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97737521 + ... + 97742958.

It is an arithmetic number, because the mean of its divisors is an integer number (132926726400).

Almost surely, 2^531511422401 is an apocalyptic number.

It is an amenable number.

531511422401 is a deficient number, since it is larger than the sum of its proper divisors (195483199).

531511422401 is a wasteful number, since it uses less digits than its factorization.

531511422401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195483198.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 531511422401 its reverse (104224115135), we get a palindrome (635735537536).

The spelling of 531511422401 in words is "five hundred thirty-one billion, five hundred eleven million, four hundred twenty-two thousand, four hundred one".