215941241947 has 2 divisors, whose sum is σ = 215941241948. Its totient is φ = 215941241946.

The previous prime is 215941241917. The next prime is 215941241951. The reversal of 215941241947 is 749142149512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215941241947 - 2¹⁵ = 215941209179 is a prime.

It is a super-2 number, since 2×215941241947² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215941241947.

It is not a weakly prime, because it can be changed into another prime (215941241917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107970620973 + 107970620974.

It is an arithmetic number, because the mean of its divisors is an integer number (107970620974).

Almost surely, 2^215941241947 is an apocalyptic number.

215941241947 is a deficient number, since it is larger than the sum of its proper divisors (1).

215941241947 is an equidigital number, since it uses as much as digits as its factorization.

215941241947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The spelling of 215941241947 in words is "two hundred fifteen billion, nine hundred forty-one million, two hundred forty-one thousand, nine hundred forty-seven".