215435523213 has 6 divisors (see below), whose sum is σ = 311184644654. Its totient is φ = 143623682136.

The previous prime is 215435523197. The next prime is 215435523241. The reversal of 215435523213 is 312325534512.

215435523213 is a `hidden beast` number, since 2 + 1 + 5 + 435 + 5 + 2 + 3 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 153850648644 + 61584874569 = 392238^2 + 248163^2 .

It is not a de Polignac number, because 215435523213 - 2⁴ = 215435523197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215435523313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11968640170 + ... + 11968640187.

Almost surely, 2^215435523213 is an apocalyptic number.

It is an amenable number.

215435523213 is a deficient number, since it is larger than the sum of its proper divisors (95749121441).

215435523213 is a wasteful number, since it uses less digits than its factorization.

215435523213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23937280363 (or 23937280360 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The spelling of 215435523213 in words is "two hundred fifteen billion, four hundred thirty-five million, five hundred twenty-three thousand, two hundred thirteen".