31047142306261 has 4 divisors (see below), whose sum is σ = 32117733420300. Its totient is φ = 29976551192224.

The previous prime is 31047142306259. The next prime is 31047142306273. The reversal of 31047142306261 is 16260324174013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5760264003025 + 25286878303236 = 2400055^2 + 5028606^2 .

It is a cyclic number.

It is not a de Polignac number, because 31047142306261 - 2¹ = 31047142306259 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 (31047142306211) 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, 535295556976 + ... + 535295557033.

It is an arithmetic number, because the mean of its divisors is an integer number (8029433355075).

Almost surely, 2^{31047142306261} is an apocalyptic number.

It is an amenable number.

31047142306261 is a deficient number, since it is larger than the sum of its proper divisors (1070591114039).

31047142306261 is a wasteful number, since it uses less digits than its factorization.

31047142306261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070591114038.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 31047142306261 in words is "thirty-one trillion, forty-seven billion, one hundred forty-two million, three hundred six thousand, two hundred sixty-one".