73131231031 has 8 divisors (see below), whose sum is σ = 73626523344. Its totient is φ = 72637192320.

The previous prime is 73131231013. The next prime is 73131231071. The reversal of 73131231031 is 13013213137.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73131231031 - 2⁵ = 73131230999 is a prime.

It is a super-2 number, since 2×73131231031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73131230987 and 73131231005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73131231071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196185 + ... + 429826.

It is an arithmetic number, because the mean of its divisors is an integer number (9203315418).

Almost surely, 2^73131231031 is an apocalyptic number.

73131231031 is a deficient number, since it is larger than the sum of its proper divisors (495292313).

73131231031 is a wasteful number, since it uses less digits than its factorization.

73131231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626801.

The product of its (nonzero) digits is 1134, while the sum is 25.

Adding to 73131231031 its reverse (13013213137), we get a palindrome (86144444168).

The spelling of 73131231031 in words is "seventy-three billion, one hundred thirty-one million, two hundred thirty-one thousand, thirty-one".