31115401043043 has 4 divisors (see below), whose sum is σ = 41487201390728. Its totient is φ = 20743600695360.

The previous prime is 31115401043017. The next prime is 31115401043071. The reversal of 31115401043043 is 34034010451113.

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

It is not a de Polignac number, because 31115401043043 - 2⁵ = 31115401043011 is a prime.

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 31115401043043.

It is not an unprimeable number, because it can be changed into a prime (31115401043093) 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, 5185900173838 + ... + 5185900173843.

It is an arithmetic number, because the mean of its divisors is an integer number (10371800347682).

Almost surely, 2^{31115401043043} is an apocalyptic number.

31115401043043 is a deficient number, since it is larger than the sum of its proper divisors (10371800347685).

31115401043043 is a wasteful number, since it uses less digits than its factorization.

31115401043043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10371800347684.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 31115401043043 its reverse (34034010451113), we get a palindrome (65149411494156).

The spelling of 31115401043043 in words is "thirty-one trillion, one hundred fifteen billion, four hundred one million, forty-three thousand, forty-three".