31021324132 has 6 divisors (see below), whose sum is σ = 54287317238. Its totient is φ = 15510662064.

The previous prime is 31021324121. The next prime is 31021324163. The reversal of 31021324132 is 23142312013.

It can be written as a sum of positive squares in only one way, i.e., 30756741376 + 264582756 = 175376^2 + 16266^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3877665513 + ... + 3877665520.

Almost surely, 2^31021324132 is an apocalyptic number.

It is an amenable number.

31021324132 is a deficient number, since it is larger than the sum of its proper divisors (23265993106).

31021324132 is a wasteful number, since it uses less digits than its factorization.

31021324132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7755331037 (or 7755331035 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31021324132 its reverse (23142312013), we get a palindrome (54163636145).

The spelling of 31021324132 in words is "thirty-one billion, twenty-one million, three hundred twenty-four thousand, one hundred thirty-two".