215241135541 has 4 divisors (see below), whose sum is σ = 215262924352. Its totient is φ = 215219346732.

The previous prime is 215241135533. The next prime is 215241135559. The reversal of 215241135541 is 145531142512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215241135541 - 2³ = 215241135533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215241135497 and 215241135506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215241135511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10879581 + ... + 10899346.

It is an arithmetic number, because the mean of its divisors is an integer number (53815731088).

Almost surely, 2^215241135541 is an apocalyptic number.

It is an amenable number.

215241135541 is a deficient number, since it is larger than the sum of its proper divisors (21788811).

215241135541 is an equidigital number, since it uses as much as digits as its factorization.

215241135541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21788810.

The product of its digits is 24000, while the sum is 34.

The spelling of 215241135541 in words is "two hundred fifteen billion, two hundred forty-one million, one hundred thirty-five thousand, five hundred forty-one".