31224020243 has 16 divisors (see below), whose sum is σ = 35021117376. Its totient is φ = 27648190080.

The previous prime is 31224020239. The next prime is 31224020249. The reversal of 31224020243 is 34202042213.

It is a cyclic number.

It is not a de Polignac number, because 31224020243 - 2² = 31224020239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31224020249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422996 + ... + 491297.

It is an arithmetic number, because the mean of its divisors is an integer number (2188819836).

Almost surely, 2^31224020243 is an apocalyptic number.

31224020243 is a deficient number, since it is larger than the sum of its proper divisors (3797097133).

31224020243 is a wasteful number, since it uses less digits than its factorization.

31224020243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914414.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31224020243 its reverse (34202042213), we get a palindrome (65426062456).

The spelling of 31224020243 in words is "thirty-one billion, two hundred twenty-four million, twenty thousand, two hundred forty-three".