215242641 has 24 divisors (see below), whose sum is σ = 322972416. Its totient is φ = 137985120.

The previous prime is 215242637. The next prime is 215242663. The reversal of 215242641 is 146242512.

215242641 is a `hidden beast` number, since 2 + 15 + 2 + 4 + 2 + 641 = 666.

215242641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215242641 - 2² = 215242637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215242631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43111 + ... + 47843.

It is an arithmetic number, because the mean of its divisors is an integer number (13457184).

Almost surely, 2^215242641 is an apocalyptic number.

It is an amenable number.

215242641 is a deficient number, since it is larger than the sum of its proper divisors (107729775).

215242641 is a wasteful number, since it uses less digits than its factorization.

215242641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933 (or 4930 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 215242641 is about 14671.1499549286. The cubic root of 215242641 is about 599.2979204610.

The spelling of 215242641 in words is "two hundred fifteen million, two hundred forty-two thousand, six hundred forty-one".