31230120243 has 8 divisors (see below), whose sum is σ = 47588754688. Its totient is φ = 17845782984.

The previous prime is 31230120239. The next prime is 31230120287. The reversal of 31230120243 is 34202103213.

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

It is not a de Polignac number, because 31230120243 - 2² = 31230120239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1487148583 = 31230120243 / (3 + 1 + 2 + 3 + 0 + 1 + 2 + 0 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31230120143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743574271 + ... + 743574312.

It is an arithmetic number, because the mean of its divisors is an integer number (5948594336).

Almost surely, 2^31230120243 is an apocalyptic number.

31230120243 is a deficient number, since it is larger than the sum of its proper divisors (16358634445).

31230120243 is a wasteful number, since it uses less digits than its factorization.

31230120243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487148593.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31230120243 its reverse (34202103213), we get a palindrome (65432223456).

The spelling of 31230120243 in words is "thirty-one billion, two hundred thirty million, one hundred twenty thousand, two hundred forty-three".