215505642541 has 8 divisors (see below), whose sum is σ = 259254908480. Its totient is φ = 174997063008.

The previous prime is 215505642491. The next prime is 215505642553. The reversal of 215505642541 is 145246505512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215505642541 - 2¹⁵ = 215505609773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215505642494 and 215505642503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215505642841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810171456 + ... + 810171721.

It is an arithmetic number, because the mean of its divisors is an integer number (32406863560).

Almost surely, 2^215505642541 is an apocalyptic number.

It is an amenable number.

215505642541 is a deficient number, since it is larger than the sum of its proper divisors (43749265939).

215505642541 is a wasteful number, since it uses less digits than its factorization.

215505642541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620343203.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 215505642541 in words is "two hundred fifteen billion, five hundred five million, six hundred forty-two thousand, five hundred forty-one".