31312204611 has 16 divisors (see below), whose sum is σ = 44012307840. Its totient is φ = 19746720000.

The previous prime is 31312204607. The next prime is 31312204619. The reversal of 31312204611 is 11640221313.

It is a happy number.

It is not a de Polignac number, because 31312204611 - 2² = 31312204607 is a prime.

It is a super-2 number, since 2×31312204611² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31312204619) 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, 369765 + ... + 446486.

It is an arithmetic number, because the mean of its divisors is an integer number (2750769240).

Almost surely, 2^31312204611 is an apocalyptic number.

31312204611 is a deficient number, since it is larger than the sum of its proper divisors (12700103229).

31312204611 is a wasteful number, since it uses less digits than its factorization.

31312204611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816946.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31312204611 its reverse (11640221313), we get a palindrome (42952425924).

The spelling of 31312204611 in words is "thirty-one billion, three hundred twelve million, two hundred four thousand, six hundred eleven".