31530021010 has 64 divisors (see below), whose sum is σ = 62133465600. Its totient is φ = 11477935872.

The previous prime is 31530020959. The next prime is 31530021031. The reversal of 31530021010 is 1012003513.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 526984 + ... + 583756.

It is an arithmetic number, because the mean of its divisors is an integer number (970835400).

Almost surely, 2^31530021010 is an apocalyptic number.

31530021010 is a deficient number, since it is larger than the sum of its proper divisors (30603444590).

31530021010 is a wasteful number, since it uses less digits than its factorization.

31530021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56915.

The product of its (nonzero) digits is 90, while the sum is 16.

Adding to 31530021010 its reverse (1012003513), we get a palindrome (32542024523).

The spelling of 31530021010 in words is "thirty-one billion, five hundred thirty million, twenty-one thousand, ten".