731310220231231 has 4 divisors (see below), whose sum is σ = 731372955957072. Its totient is φ = 731247484505392.

The previous prime is 731310220231229. The next prime is 731310220231237. The reversal of 731310220231231 is 132132022013137.

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 731310220231231 - 2¹ = 731310220231229 is a prime.

It is a super-2 number, since 2×731310220231231² (a number of 31 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 = 731310220231193 and 731310220231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731310220231237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31367845435 + ... + 31367868748.

It is an arithmetic number, because the mean of its divisors is an integer number (182843238989268).

Almost surely, 2^{731310220231231} is an apocalyptic number.

731310220231231 is a deficient number, since it is larger than the sum of its proper divisors (62735725841).

731310220231231 is a wasteful number, since it uses less digits than its factorization.

731310220231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62735725840.

The product of its (nonzero) digits is 9072, while the sum is 31.

Adding to 731310220231231 its reverse (132132022013137), we get a palindrome (863442242244368).

The spelling of 731310220231231 in words is "seven hundred thirty-one trillion, three hundred ten billion, two hundred twenty million, two hundred thirty-one thousand, two hundred thirty-one".