215154211320243 has 48 divisors (see below), whose sum is σ = 341045325863424. Its totient is φ = 129905145169920.

The previous prime is 215154211320233. The next prime is 215154211320263. The reversal of 215154211320243 is 342023112451512.

215154211320243 is a `hidden beast` number, since 2 + 1 + 5 + 15 + 421 + 13 + 202 + 4 + 3 = 666.

It is not a de Polignac number, because 215154211320243 - 2²¹ = 215154209223091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215154211320198 and 215154211320207.

It is not an unprimeable number, because it can be changed into a prime (215154211320233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64313046 + ... + 67575707.

It is an arithmetic number, because the mean of its divisors is an integer number (7105110955488).

Almost surely, 2^{215154211320243} is an apocalyptic number.

215154211320243 is a deficient number, since it is larger than the sum of its proper divisors (125891114543181).

215154211320243 is a wasteful number, since it uses less digits than its factorization.

215154211320243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131889036 (or 131889033 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 215154211320243 its reverse (342023112451512), we get a palindrome (557177323771755).

The spelling of 215154211320243 in words is "two hundred fifteen trillion, one hundred fifty-four billion, two hundred eleven million, three hundred twenty thousand, two hundred forty-three".