31151340827 has 2 divisors, whose sum is σ = 31151340828. Its totient is φ = 31151340826.

The previous prime is 31151340763. The next prime is 31151340833. The reversal of 31151340827 is 72804315113.

It is a strong prime.

It is an emirp because it is prime and its reverse (72804315113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31151340827 - 2⁶ = 31151340763 is a prime.

It is not a weakly prime, because it can be changed into another prime (31151340877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15575670413 + 15575670414.

It is an arithmetic number, because the mean of its divisors is an integer number (15575670414).

Almost surely, 2^31151340827 is an apocalyptic number.

31151340827 is a deficient number, since it is larger than the sum of its proper divisors (1).

31151340827 is an equidigital number, since it uses as much as digits as its factorization.

31151340827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 31151340827 in words is "thirty-one billion, one hundred fifty-one million, three hundred forty thousand, eight hundred twenty-seven".