135215245091 has 2 divisors, whose sum is σ = 135215245092. Its totient is φ = 135215245090.

The previous prime is 135215245073. The next prime is 135215245117. The reversal of 135215245091 is 190542512531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135215245091 - 2⁶ = 135215245027 is a prime.

It is not a weakly prime, because it can be changed into another prime (135215245001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67607622545 + 67607622546.

It is an arithmetic number, because the mean of its divisors is an integer number (67607622546).

Almost surely, 2^135215245091 is an apocalyptic number.

135215245091 is a deficient number, since it is larger than the sum of its proper divisors (1).

135215245091 is an equidigital number, since it uses as much as digits as its factorization.

135215245091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 135215245091 in words is "one hundred thirty-five billion, two hundred fifteen million, two hundred forty-five thousand, ninety-one".