531113554445 has 4 divisors (see below), whose sum is σ = 637336265340. Its totient is φ = 424890843552.

The previous prime is 531113554429. The next prime is 531113554519. The reversal of 531113554445 is 544455311135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544455311135 = 5 ⋅108891062227.

It can be written as a sum of positive squares in 2 ways, for example, as 108297595396 + 422815959049 = 329086^2 + 650243^2 .

It is a cyclic number.

It is not a de Polignac number, because 531113554445 - 2⁴ = 531113554429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53111355440 + ... + 53111355449.

It is an arithmetic number, because the mean of its divisors is an integer number (159334066335).

Almost surely, 2^531113554445 is an apocalyptic number.

It is an amenable number.

531113554445 is a deficient number, since it is larger than the sum of its proper divisors (106222710895).

531113554445 is a wasteful number, since it uses less digits than its factorization.

531113554445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106222710894.

The product of its digits is 360000, while the sum is 41.

The spelling of 531113554445 in words is "five hundred thirty-one billion, one hundred thirteen million, five hundred fifty-four thousand, four hundred forty-five".