531245554331 has 4 divisors (see below), whose sum is σ = 554343187152. Its totient is φ = 508147921512.

The previous prime is 531245554319. The next prime is 531245554339. The reversal of 531245554331 is 133455542135.

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 531245554331 - 2⁶ = 531245554267 is a prime.

It is a super-2 number, since 2×531245554331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531245554339) 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, 11548816376 + ... + 11548816421.

It is an arithmetic number, because the mean of its divisors is an integer number (138585796788).

Almost surely, 2^531245554331 is an apocalyptic number.

531245554331 is a deficient number, since it is larger than the sum of its proper divisors (23097632821).

531245554331 is a wasteful number, since it uses less digits than its factorization.

531245554331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23097632820.

The product of its digits is 540000, while the sum is 41.

The spelling of 531245554331 in words is "five hundred thirty-one billion, two hundred forty-five million, five hundred fifty-four thousand, three hundred thirty-one".