215400455147 has 2 divisors, whose sum is σ = 215400455148. Its totient is φ = 215400455146.

The previous prime is 215400455099. The next prime is 215400455167. The reversal of 215400455147 is 741554004512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215400455147 - 2¹⁴ = 215400438763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215400455147.

It is not a weakly prime, because it can be changed into another prime (215400455167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107700227573 + 107700227574.

It is an arithmetic number, because the mean of its divisors is an integer number (107700227574).

Almost surely, 2^215400455147 is an apocalyptic number.

215400455147 is a deficient number, since it is larger than the sum of its proper divisors (1).

215400455147 is an equidigital number, since it uses as much as digits as its factorization.

215400455147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112000, while the sum is 38.

Adding to 215400455147 its reverse (741554004512), we get a palindrome (956954459659).

The spelling of 215400455147 in words is "two hundred fifteen billion, four hundred million, four hundred fifty-five thousand, one hundred forty-seven".