31780102043 has 2 divisors, whose sum is σ = 31780102044. Its totient is φ = 31780102042.

The previous prime is 31780102007. The next prime is 31780102091. The reversal of 31780102043 is 34020108713.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31780102043 - 2¹⁶ = 31780036507 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 31780101997 and 31780102015.

It is not a weakly prime, because it can be changed into another prime (31780102093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15890051021 + 15890051022.

It is an arithmetic number, because the mean of its divisors is an integer number (15890051022).

Almost surely, 2^31780102043 is an apocalyptic number.

31780102043 is a deficient number, since it is larger than the sum of its proper divisors (1).

31780102043 is an equidigital number, since it uses as much as digits as its factorization.

31780102043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 31780102043 in words is "thirty-one billion, seven hundred eighty million, one hundred two thousand, forty-three".