531445123240 has 32 divisors (see below), whose sum is σ = 1258685820000. Its totient is φ = 201389730624.

The previous prime is 531445123211. The next prime is 531445123289. The reversal of 531445123240 is 42321544135.

It is a junction number, because it is equal to n+sod(n) for n = 531445123196 and 531445123205.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 349634190 + ... + 349635709.

It is an arithmetic number, because the mean of its divisors is an integer number (39333931875).

Almost surely, 2^531445123240 is an apocalyptic number.

It is an amenable number.

531445123240 is an abundant number, since it is smaller than the sum of its proper divisors (727240696760).

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

531445123240 is a wasteful number, since it uses less digits than its factorization.

531445123240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699269929 (or 699269925 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 531445123240 its reverse (42321544135), we get a palindrome (573766667375).

The spelling of 531445123240 in words is "five hundred thirty-one billion, four hundred forty-five million, one hundred twenty-three thousand, two hundred forty".