531118382755381 has 4 divisors (see below), whose sum is σ = 532350675987264. Its totient is φ = 529886089523500.

The previous prime is 531118382755343. The next prime is 531118382755409. The reversal of 531118382755381 is 183557283811135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 531118382755381 - 2¹⁹ = 531118382231093 is a prime.

It is a super-2 number, since 2×531118382755381² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531118382755781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616146615295 + ... + 616146616156.

It is an arithmetic number, because the mean of its divisors is an integer number (133087668996816).

Almost surely, 2^{531118382755381} is an apocalyptic number.

It is an amenable number.

531118382755381 is a deficient number, since it is larger than the sum of its proper divisors (1232293231883).

531118382755381 is a wasteful number, since it uses less digits than its factorization.

531118382755381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232293231882.

The product of its digits is 24192000, while the sum is 61.

The spelling of 531118382755381 in words is "five hundred thirty-one trillion, one hundred eighteen billion, three hundred eighty-two million, seven hundred fifty-five thousand, three hundred eighty-one".