31433220243 has 12 divisors (see below), whose sum is σ = 45417757320. Its totient is φ = 20948918496.

The previous prime is 31433220239. The next prime is 31433220253. The reversal of 31433220243 is 34202233413.

31433220243 is a `hidden beast` number, since 3 + 1 + 433 + 220 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 31433220243 - 2² = 31433220239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31433220223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 516378 + ... + 574031.

It is an arithmetic number, because the mean of its divisors is an integer number (3784813110).

Almost surely, 2^31433220243 is an apocalyptic number.

31433220243 is a deficient number, since it is larger than the sum of its proper divisors (13984537077).

31433220243 is a wasteful number, since it uses less digits than its factorization.

31433220243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093618 (or 1093615 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 31433220243 its reverse (34202233413), we get a palindrome (65635453656).

The spelling of 31433220243 in words is "thirty-one billion, four hundred thirty-three million, two hundred twenty thousand, two hundred forty-three".