31071040061 has 4 divisors (see below), whose sum is σ = 31793622432. Its totient is φ = 30348457692.

The previous prime is 31071040057. The next prime is 31071040087. The reversal of 31071040061 is 16004017013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31071040061 - 2² = 31071040057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31071040031) 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, 361291121 + ... + 361291206.

It is an arithmetic number, because the mean of its divisors is an integer number (7948405608).

Almost surely, 2^31071040061 is an apocalyptic number.

It is an amenable number.

31071040061 is a deficient number, since it is larger than the sum of its proper divisors (722582371).

31071040061 is an equidigital number, since it uses as much as digits as its factorization.

31071040061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722582370.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 31071040061 its reverse (16004017013), we get a palindrome (47075057074).

The spelling of 31071040061 in words is "thirty-one billion, seventy-one million, forty thousand, sixty-one".