31600342061 has 4 divisors (see below), whose sum is σ = 31600697724. Its totient is φ = 31599986400.

The previous prime is 31600342051. The next prime is 31600342073. The reversal of 31600342061 is 16024300613.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4579228900 + 27021113161 = 67670^2 + 164381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31600342061 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 31600342061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31600342021) 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, 81641 + ... + 264321.

It is an arithmetic number, because the mean of its divisors is an integer number (7900174431).

Almost surely, 2^31600342061 is an apocalyptic number.

It is an amenable number.

31600342061 is a deficient number, since it is larger than the sum of its proper divisors (355663).

31600342061 is a wasteful number, since it uses less digits than its factorization.

31600342061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355662.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31600342061 its reverse (16024300613), we get a palindrome (47624642674).

The spelling of 31600342061 in words is "thirty-one billion, six hundred million, three hundred forty-two thousand, sixty-one".