75531081031 has 4 divisors (see below), whose sum is σ = 86321235472. Its totient is φ = 64740926592.

The previous prime is 75531081011. The next prime is 75531081037. The reversal of 75531081031 is 13018013557.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75531081031 is a prime.

It is a super-2 number, since 2×75531081031² (a number of 23 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 (75531081037) 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, 5395077210 + ... + 5395077223.

It is an arithmetic number, because the mean of its divisors is an integer number (21580308868).

Almost surely, 2^75531081031 is an apocalyptic number.

75531081031 is a deficient number, since it is larger than the sum of its proper divisors (10790154441).

75531081031 is a wasteful number, since it uses less digits than its factorization.

75531081031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10790154440.

The product of its (nonzero) digits is 12600, while the sum is 34.

Adding to 75531081031 its reverse (13018013557), we get a palindrome (88549094588).

The spelling of 75531081031 in words is "seventy-five billion, five hundred thirty-one million, eighty-one thousand, thirty-one".