31213042502 has 8 divisors (see below), whose sum is σ = 47518363416. Its totient is φ = 15373588032.

The previous prime is 31213042477. The next prime is 31213042613. The reversal of 31213042502 is 20524031213.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 116466443 + ... + 116466710.

It is an arithmetic number, because the mean of its divisors is an integer number (5939795427).

Almost surely, 2^31213042502 is an apocalyptic number.

31213042502 is a deficient number, since it is larger than the sum of its proper divisors (16305320914).

31213042502 is a wasteful number, since it uses less digits than its factorization.

31213042502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232933222.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 31213042502 its reverse (20524031213), we get a palindrome (51737073715).

The spelling of 31213042502 in words is "thirty-one billion, two hundred thirteen million, forty-two thousand, five hundred two".