531321154532 has 36 divisors (see below), whose sum is σ = 1102025974140. Its totient is φ = 223412664384.

The previous prime is 531321154493. The next prime is 531321154541. The reversal of 531321154532 is 235451123135.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 300244818916 + 231076335616 = 547946^2 + 480704^2 .

It is a junction number, because it is equal to n+sod(n) for n = 531321154492 and 531321154501.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25563407 + ... + 25584182.

It is an arithmetic number, because the mean of its divisors is an integer number (30611832615).

Almost surely, 2^531321154532 is an apocalyptic number.

It is an amenable number.

531321154532 is an abundant number, since it is smaller than the sum of its proper divisors (570704819608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531321154532 is a wasteful number, since it uses less digits than its factorization.

531321154532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51147660 (or 51147651 counting only the distinct ones).

The product of its digits is 54000, while the sum is 35.

Adding to 531321154532 its reverse (235451123135), we get a palindrome (766772277667).

The spelling of 531321154532 in words is "five hundred thirty-one billion, three hundred twenty-one million, one hundred fifty-four thousand, five hundred thirty-two".