531263401 has 4 divisors (see below), whose sum is σ = 531392400. Its totient is φ = 531134404.

The previous prime is 531263371. The next prime is 531263437. The reversal of 531263401 is 104362135.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104362135 = 5 ⋅20872427.

It is a cyclic number.

It is not a de Polignac number, because 531263401 - 2⁷ = 531263273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531263101) 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, 58111 + ... + 66628.

It is an arithmetic number, because the mean of its divisors is an integer number (132848100).

Almost surely, 2^531263401 is an apocalyptic number.

It is an amenable number.

531263401 is a deficient number, since it is larger than the sum of its proper divisors (128999).

531263401 is a wasteful number, since it uses less digits than its factorization.

531263401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128998.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 531263401 is about 23049.1518499055. The cubic root of 531263401 is about 809.9097603072.

The spelling of 531263401 in words is "five hundred thirty-one million, two hundred sixty-three thousand, four hundred one".