215135525123 has 2 divisors, whose sum is σ = 215135525124. Its totient is φ = 215135525122.

The previous prime is 215135525117. The next prime is 215135525191. The reversal of 215135525123 is 321525531512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215135525123 - 2¹⁴ = 215135508739 is a prime.

It is not a weakly prime, because it can be changed into another prime (215135525023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107567762561 + 107567762562.

It is an arithmetic number, because the mean of its divisors is an integer number (107567762562).

Almost surely, 2^215135525123 is an apocalyptic number.

215135525123 is a deficient number, since it is larger than the sum of its proper divisors (1).

215135525123 is an equidigital number, since it uses as much as digits as its factorization.

215135525123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45000, while the sum is 35.

The spelling of 215135525123 in words is "two hundred fifteen billion, one hundred thirty-five million, five hundred twenty-five thousand, one hundred twenty-three".