31223423224240 has 80 divisors (see below), whose sum is σ = 78180249268800. Its totient is φ = 11528412466176.

The previous prime is 31223423224223. The next prime is 31223423224271. The reversal of 31223423224240 is 4242232432213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-4 number, since 4×31223423224240⁴ (a number of 55 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31223423224196 and 31223423224205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55337466 + ... + 55898854.

It is an arithmetic number, because the mean of its divisors is an integer number (977253115860).

Almost surely, 2^{31223423224240} is an apocalyptic number.

It is an amenable number.

31223423224240 is an abundant number, since it is smaller than the sum of its proper divisors (46956826044560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31223423224240 is a wasteful number, since it uses less digits than its factorization.

31223423224240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614894 (or 614888 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 31223423224240 its reverse (4242232432213), we get a palindrome (35465655656453).

The spelling of 31223423224240 in words is "thirty-one trillion, two hundred twenty-three billion, four hundred twenty-three million, two hundred twenty-four thousand, two hundred forty".