31122004340 has 48 divisors (see below), whose sum is σ = 74871216000. Its totient is φ = 10644915072.

The previous prime is 31122004273. The next prime is 31122004391. The reversal of 31122004340 is 4340022113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206615 + ... + 323934.

It is an arithmetic number, because the mean of its divisors is an integer number (1559817000).

Almost surely, 2^31122004340 is an apocalyptic number.

It is an amenable number.

31122004340 is an abundant number, since it is smaller than the sum of its proper divisors (43749211660).

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

31122004340 is a wasteful number, since it uses less digits than its factorization.

31122004340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530984 (or 530982 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31122004340 its reverse (4340022113), we get a palindrome (35462026453).

The spelling of 31122004340 in words is "thirty-one billion, one hundred twenty-two million, four thousand, three hundred forty".