31881464101 has 2 divisors, whose sum is σ = 31881464102. Its totient is φ = 31881464100.

The previous prime is 31881464093. The next prime is 31881464107. The reversal of 31881464101 is 10146418813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31878317025 + 3147076 = 178545^2 + 1774^2 .

It is a cyclic number.

It is not a de Polignac number, because 31881464101 - 2³ = 31881464093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31881464107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15940732050 + 15940732051.

It is an arithmetic number, because the mean of its divisors is an integer number (15940732051).

Almost surely, 2^31881464101 is an apocalyptic number.

It is an amenable number.

31881464101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31881464101 is an equidigital number, since it uses as much as digits as its factorization.

31881464101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 31881464101 in words is "thirty-one billion, eight hundred eighty-one million, four hundred sixty-four thousand, one hundred one".