215320020511 has 2 divisors, whose sum is σ = 215320020512. Its totient is φ = 215320020510.

The previous prime is 215320020499. The next prime is 215320020527. The reversal of 215320020511 is 115020023512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215320020511 - 2¹⁷ = 215319889439 is a prime.

It is a super-4 number, since 4×215320020511⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215320020581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107660010255 + 107660010256.

It is an arithmetic number, because the mean of its divisors is an integer number (107660010256).

Almost surely, 2^215320020511 is an apocalyptic number.

215320020511 is a deficient number, since it is larger than the sum of its proper divisors (1).

215320020511 is an equidigital number, since it uses as much as digits as its factorization.

215320020511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 215320020511 in words is "two hundred fifteen billion, three hundred twenty million, twenty thousand, five hundred eleven".