531401032511 has 4 divisors (see below), whose sum is σ = 531405192432. Its totient is φ = 531396872592.

The previous prime is 531401032447. The next prime is 531401032523. The reversal of 531401032511 is 115230104135.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 531401032511 - 2⁶ = 531401032447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531401032531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1882070 + ... + 2145923.

It is an arithmetic number, because the mean of its divisors is an integer number (132851298108).

Almost surely, 2^531401032511 is an apocalyptic number.

531401032511 is a deficient number, since it is larger than the sum of its proper divisors (4159921).

531401032511 is a wasteful number, since it uses less digits than its factorization.

531401032511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159920.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 531401032511 its reverse (115230104135), we get a palindrome (646631136646).

The spelling of 531401032511 in words is "five hundred thirty-one billion, four hundred one million, thirty-two thousand, five hundred eleven".