31212302004 has 288 divisors, whose sum is σ = 90612587520. Its totient is φ = 8990198784.

The previous prime is 31212301987. The next prime is 31212302021. The reversal of 31212302004 is 40020321213.

It is an interprime number because it is at equal distance from previous prime (31212301987) and next prime (31212302021).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 106526482 + ... + 106526774.

It is an arithmetic number, because the mean of its divisors is an integer number (314627040).

Almost surely, 2^31212302004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31212302004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45306293760).

31212302004 is an abundant number, since it is smaller than the sum of its proper divisors (59400285516).

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

31212302004 is a wasteful number, since it uses less digits than its factorization.

31212302004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31212302004 its reverse (40020321213), we get a palindrome (71232623217).

The spelling of 31212302004 in words is "thirty-one billion, two hundred twelve million, three hundred two thousand, four".