31282000021 has 8 divisors (see below), whose sum is σ = 31439923200. Its totient is φ = 31124234832.

The previous prime is 31282000019. The next prime is 31282000027. The reversal of 31282000021 is 12000028213.

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

It is a cyclic number.

It is not a de Polignac number, because 31282000021 - 2¹ = 31282000019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31282000027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368055 + ... + 445003.

It is an arithmetic number, because the mean of its divisors is an integer number (3929990400).

Almost surely, 2^31282000021 is an apocalyptic number.

It is an amenable number.

31282000021 is a deficient number, since it is larger than the sum of its proper divisors (157923179).

31282000021 is a wasteful number, since it uses less digits than its factorization.

31282000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78995.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31282000021 its reverse (12000028213), we get a palindrome (43282028234).

The spelling of 31282000021 in words is "thirty-one billion, two hundred eighty-two million, twenty-one", and thus it is an aban number.