31219104377 has 2 divisors, whose sum is σ = 31219104378. Its totient is φ = 31219104376.

The previous prime is 31219104341. The next prime is 31219104401. The reversal of 31219104377 is 77340191213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27194978281 + 4024126096 = 164909^2 + 63436^2 .

It is a cyclic number.

It is not a de Polignac number, because 31219104377 - 2¹⁶ = 31219038841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31219104377.

It is not a weakly prime, because it can be changed into another prime (31219104277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15609552188 + 15609552189.

It is an arithmetic number, because the mean of its divisors is an integer number (15609552189).

Almost surely, 2^31219104377 is an apocalyptic number.

It is an amenable number.

31219104377 is a deficient number, since it is larger than the sum of its proper divisors (1).

31219104377 is an equidigital number, since it uses as much as digits as its factorization.

31219104377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 31219104377 in words is "thirty-one billion, two hundred nineteen million, one hundred four thousand, three hundred seventy-seven".