31402031311 has 4 divisors (see below), whose sum is σ = 35888035792. Its totient is φ = 26916026832.

The previous prime is 31402031299. The next prime is 31402031317. The reversal of 31402031311 is 11313020413.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31402031311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402031317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2243002230 + ... + 2243002243.

It is an arithmetic number, because the mean of its divisors is an integer number (8972008948).

Almost surely, 2^31402031311 is an apocalyptic number.

31402031311 is a deficient number, since it is larger than the sum of its proper divisors (4486004481).

31402031311 is an equidigital number, since it uses as much as digits as its factorization.

31402031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486004480.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31402031311 its reverse (11313020413), we get a palindrome (42715051724).

The spelling of 31402031311 in words is "thirty-one billion, four hundred two million, thirty-one thousand, three hundred eleven".