31311132132002 has 4 divisors (see below), whose sum is σ = 46966698198006. Its totient is φ = 15655566066000.

The previous prime is 31311132131999. The next prime is 31311132132013. The reversal of 31311132132002 is 20023123111313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23232968763481 + 8078163368521 = 4820059^2 + 2842211^2 .

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 as a sum of consecutive naturals, namely, 7827783032999 + ... + 7827783033002.

Almost surely, 2^{31311132132002} is an apocalyptic number.

31311132132002 is a deficient number, since it is larger than the sum of its proper divisors (15655566066004).

31311132132002 is a wasteful number, since it uses less digits than its factorization.

31311132132002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15655566066003.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31311132132002 its reverse (20023123111313), we get a palindrome (51334255243315).

The spelling of 31311132132002 in words is "thirty-one trillion, three hundred eleven billion, one hundred thirty-two million, one hundred thirty-two thousand, two".