215545041 has 6 divisors (see below), whose sum is σ = 311342850. Its totient is φ = 143696688.

The previous prime is 215545037. The next prime is 215545051. The reversal of 215545041 is 140545512.

215545041 is a `hidden beast` number, since 2 + 155 + 4 + 504 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 174636225 + 40908816 = 13215^2 + 6396^2 .

It is not a de Polignac number, because 215545041 - 2² = 215545037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215544996 and 215545014.

It is not an unprimeable number, because it can be changed into a prime (215545021) 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, 11974716 + ... + 11974733.

It is an arithmetic number, because the mean of its divisors is an integer number (51890475).

Almost surely, 2^215545041 is an apocalyptic number.

It is an amenable number.

215545041 is a deficient number, since it is larger than the sum of its proper divisors (95797809).

215545041 is a wasteful number, since it uses less digits than its factorization.

215545041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23949455 (or 23949452 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 215545041 is about 14681.4522783000. The cubic root of 215545041 is about 599.5784455558.

The spelling of 215545041 in words is "two hundred fifteen million, five hundred forty-five thousand, forty-one".