31122040 has 16 divisors (see below), whose sum is σ = 70024680. Its totient is φ = 12448800.

The previous prime is 31122031. The next prime is 31122071. The reversal of 31122040 is 4022113.

It is a self number, because there is not a number n which added to its sum of digits gives 31122040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388986 + ... + 389065.

Almost surely, 2^31122040 is an apocalyptic number.

It is an amenable number.

31122040 is an abundant number, since it is smaller than the sum of its proper divisors (38902640).

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

31122040 is a wasteful number, since it uses less digits than its factorization.

31122040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778062 (or 778058 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31122040 is about 5578.7131132547. The cubic root of 31122040 is about 314.5497556762.

Adding to 31122040 its reverse (4022113), we get a palindrome (35144153).

The spelling of 31122040 in words is "thirty-one million, one hundred twenty-two thousand, forty".