531405324231 has 4 divisors (see below), whose sum is σ = 708540432312. Its totient is φ = 354270216152.

The previous prime is 531405324211. The next prime is 531405324239. The reversal of 531405324231 is 132423504135.

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 531405324231 - 2²² = 531401129927 is a prime.

It is a super-2 number, since 2×531405324231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 531405324192 and 531405324201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531405324239) 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, 88567554036 + ... + 88567554041.

It is an arithmetic number, because the mean of its divisors is an integer number (177135108078).

Almost surely, 2^531405324231 is an apocalyptic number.

531405324231 is a deficient number, since it is larger than the sum of its proper divisors (177135108081).

531405324231 is a wasteful number, since it uses less digits than its factorization.

531405324231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177135108080.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 531405324231 its reverse (132423504135), we get a palindrome (663828828366).

The spelling of 531405324231 in words is "five hundred thirty-one billion, four hundred five million, three hundred twenty-four thousand, two hundred thirty-one".