215555241 has 32 divisors (see below), whose sum is σ = 330946560. Its totient is φ = 123516800.

The previous prime is 215555237. The next prime is 215555251. The reversal of 215555241 is 142555512.

215555241 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 215555241 - 2² = 215555237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215555199 and 215555208.

It is not an unprimeable number, because it can be changed into a prime (215555251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65956 + ... + 69146.

It is an arithmetic number, because the mean of its divisors is an integer number (10342080).

Almost surely, 2^215555241 is an apocalyptic number.

It is an amenable number.

215555241 is a deficient number, since it is larger than the sum of its proper divisors (115391319).

215555241 is a wasteful number, since it uses less digits than its factorization.

215555241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317.

The product of its digits is 10000, while the sum is 30.

The square root of 215555241 is about 14681.7996512689. The cubic root of 215555241 is about 599.5879031362.

It can be divided in two parts, 21555 and 5241, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 215555241 in words is "two hundred fifteen million, five hundred fifty-five thousand, two hundred forty-one".