31224143224 has 8 divisors (see below), whose sum is σ = 58545268560. Its totient is φ = 15612071608.

The previous prime is 31224143213. The next prime is 31224143239. The reversal of 31224143224 is 42234142213.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×31224143224² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31224143192 and 31224143201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1951508944 + ... + 1951508959.

It is an arithmetic number, because the mean of its divisors is an integer number (7318158570).

Almost surely, 2^31224143224 is an apocalyptic number.

It is an amenable number.

31224143224 is a deficient number, since it is larger than the sum of its proper divisors (27321125336).

31224143224 is a wasteful number, since it uses less digits than its factorization.

31224143224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903017909 (or 3903017905 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

Adding to 31224143224 its reverse (42234142213), we get a palindrome (73458285437).

The spelling of 31224143224 in words is "thirty-one billion, two hundred twenty-four million, one hundred forty-three thousand, two hundred twenty-four".