31330421402 has 32 divisors (see below), whose sum is σ = 55185506688. Its totient is φ = 13058594496.

The previous prime is 31330421389. The next prime is 31330421407. The reversal of 31330421402 is 20412403313.

It is a super-3 number, since 3×31330421402³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31330421407) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1265648 + ... + 1290164.

It is an arithmetic number, because the mean of its divisors is an integer number (1724547084).

Almost surely, 2^31330421402 is an apocalyptic number.

31330421402 is a deficient number, since it is larger than the sum of its proper divisors (23855085286).

31330421402 is a wasteful number, since it uses less digits than its factorization.

31330421402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27030.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31330421402 its reverse (20412403313), we get a palindrome (51742824715).

The spelling of 31330421402 in words is "thirty-one billion, three hundred thirty million, four hundred twenty-one thousand, four hundred two".