31223350040 has 32 divisors (see below), whose sum is σ = 72518751360. Its totient is φ = 12086457600.

The previous prime is 31223350031. The next prime is 31223350073. The reversal of 31223350040 is 4005332213.

It is a junction number, because it is equal to n+sod(n) for n = 31223349988 and 31223350015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12588821 + ... + 12591300.

It is an arithmetic number, because the mean of its divisors is an integer number (2266210980).

Almost surely, 2^31223350040 is an apocalyptic number.

It is an amenable number.

31223350040 is an abundant number, since it is smaller than the sum of its proper divisors (41295401320).

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

31223350040 is a wasteful number, since it uses less digits than its factorization.

31223350040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25180163 (or 25180159 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 31223350040 its reverse (4005332213), we get a palindrome (35228682253).

The spelling of 31223350040 in words is "thirty-one billion, two hundred twenty-three million, three hundred fifty thousand, forty".