31000213461131 has 4 divisors (see below), whose sum is σ = 31011273119112. Its totient is φ = 30989153803152.

The previous prime is 31000213461121. The next prime is 31000213461137. The reversal of 31000213461131 is 13116431200013.

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-31000213461131 is a prime.

It is a super-2 number, since 2×31000213461131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31000213461131.

It is not an unprimeable number, because it can be changed into a prime (31000213461137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5529824786 + ... + 5529830391.

It is an arithmetic number, because the mean of its divisors is an integer number (7752818279778).

Almost surely, 2^{31000213461131} is an apocalyptic number.

31000213461131 is a deficient number, since it is larger than the sum of its proper divisors (11059657981).

31000213461131 is a wasteful number, since it uses less digits than its factorization.

31000213461131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11059657980.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 31000213461131 its reverse (13116431200013), we get a palindrome (44116644661144).

The spelling of 31000213461131 in words is "thirty-one trillion, two hundred thirteen million, four hundred sixty-one thousand, one hundred thirty-one".