31240004212 has 48 divisors (see below), whose sum is σ = 57928711680. Its totient is φ = 14700117600.

The previous prime is 31240004197. The next prime is 31240004233. The reversal of 31240004212 is 21240004213.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 31240004212.

It is a congruent number.

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, 10373787 + ... + 10376797.

It is an arithmetic number, because the mean of its divisors is an integer number (1206848160).

Almost surely, 2^31240004212 is an apocalyptic number.

It is an amenable number.

31240004212 is a deficient number, since it is larger than the sum of its proper divisors (26688707468).

31240004212 is a wasteful number, since it uses less digits than its factorization.

31240004212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892 (or 3890 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 31240004212 its reverse (21240004213), we get a palindrome (52480008425).

Subtracting from 31240004212 its reverse (21240004213), we obtain a palindrome (9999999999).

The spelling of 31240004212 in words is "thirty-one billion, two hundred forty million, four thousand, two hundred twelve".