215206217012106 has 32 divisors (see below), whose sum is σ = 478240787882880. Its totient is φ = 71734693159008.

The previous prime is 215206217012077. The next prime is 215206217012107. The reversal of 215206217012106 is 601210712602512.

215206217012106 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 0 + 621 + 7 + 0 + 1 + 21 + 0 + 6 = 666.

215206217012106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×215206217012106³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (215206217012107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14290926 + ... + 25192121.

It is an arithmetic number, because the mean of its divisors is an integer number (14945024621340).

Almost surely, 2^{215206217012106} is an apocalyptic number.

215206217012106 is an abundant number, since it is smaller than the sum of its proper divisors (263034570870774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215206217012106 is a wasteful number, since it uses less digits than its factorization.

215206217012106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39583995 (or 39583989 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 215206217012106 its reverse (601210712602512), we get a palindrome (816416929614618).

The spelling of 215206217012106 in words is "two hundred fifteen trillion, two hundred six billion, two hundred seventeen million, twelve thousand, one hundred six".