215400455099 has 2 divisors, whose sum is σ = 215400455100. Its totient is φ = 215400455098.

The previous prime is 215400455059. The next prime is 215400455147. The reversal of 215400455099 is 990554004512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215400455099 - 2¹⁶ = 215400389563 is a prime.

It is not a weakly prime, because it can be changed into another prime (215400455059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107700227549 + 107700227550.

It is an arithmetic number, because the mean of its divisors is an integer number (107700227550).

Almost surely, 2^215400455099 is an apocalyptic number.

215400455099 is a deficient number, since it is larger than the sum of its proper divisors (1).

215400455099 is an equidigital number, since it uses as much as digits as its factorization.

215400455099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 215400455099 in words is "two hundred fifteen billion, four hundred million, four hundred fifty-five thousand, ninety-nine".