31829257212 has 24 divisors (see below), whose sum is σ = 75995437056. Its totient is φ = 10363013808.

The previous prime is 31829257189. The next prime is 31829257249. The reversal of 31829257212 is 21275292813.

It is a super-2 number, since 2×31829257212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30841788 + ... + 30842819.

It is an arithmetic number, because the mean of its divisors is an integer number (3166476544).

Almost surely, 2^31829257212 is an apocalyptic number.

It is an amenable number.

31829257212 is an abundant number, since it is smaller than the sum of its proper divisors (44166179844).

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

31829257212 is a wasteful number, since it uses less digits than its factorization.

31829257212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61684657 (or 61684655 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The spelling of 31829257212 in words is "thirty-one billion, eight hundred twenty-nine million, two hundred fifty-seven thousand, two hundred twelve".