215245414387 has 2 divisors, whose sum is σ = 215245414388. Its totient is φ = 215245414386.

The previous prime is 215245414339. The next prime is 215245414429. The reversal of 215245414387 is 783414542512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215245414387 is a prime.

It is not a weakly prime, because it can be changed into another prime (215245414327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107622707193 + 107622707194.

It is an arithmetic number, because the mean of its divisors is an integer number (107622707194).

Almost surely, 2^215245414387 is an apocalyptic number.

215245414387 is a deficient number, since it is larger than the sum of its proper divisors (1).

215245414387 is an equidigital number, since it uses as much as digits as its factorization.

215245414387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1075200, while the sum is 46.

Adding to 215245414387 its reverse (783414542512), we get a palindrome (998659956899).

The spelling of 215245414387 in words is "two hundred fifteen billion, two hundred forty-five million, four hundred fourteen thousand, three hundred eighty-seven".