215220665752135 has 16 divisors (see below), whose sum is σ = 267171219136800. Its totient is φ = 166238951890816.

The previous prime is 215220665752129. The next prime is 215220665752163. The reversal of 215220665752135 is 531257566022512.

It is a cyclic number.

It is not a de Polignac number, because 215220665752135 - 2¹⁹ = 215220665227847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56388081 + ... + 60083749.

It is an arithmetic number, because the mean of its divisors is an integer number (16698201196050).

Almost surely, 2^{215220665752135} is an apocalyptic number.

215220665752135 is a deficient number, since it is larger than the sum of its proper divisors (51950553384665).

215220665752135 is a wasteful number, since it uses less digits than its factorization.

215220665752135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097330.

The product of its (nonzero) digits is 7560000, while the sum is 52.

The spelling of 215220665752135 in words is "two hundred fifteen trillion, two hundred twenty billion, six hundred sixty-five million, seven hundred fifty-two thousand, one hundred thirty-five".