213508538041 has 4 divisors (see below), whose sum is σ = 213883773300. Its totient is φ = 213133302784.

The previous prime is 213508538029. The next prime is 213508538051. The reversal of 213508538041 is 140835805312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68725244025 + 144783294016 = 262155^2 + 380504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213508538041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213508537985 and 213508538003.

It is not an unprimeable number, because it can be changed into a prime (213508538011) 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, 187616776 + ... + 187617913.

It is an arithmetic number, because the mean of its divisors is an integer number (53470943325).

Almost surely, 2^213508538041 is an apocalyptic number.

It is an amenable number.

213508538041 is a deficient number, since it is larger than the sum of its proper divisors (375235259).

213508538041 is an equidigital number, since it uses as much as digits as its factorization.

213508538041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375235258.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 213508538041 in words is "two hundred thirteen billion, five hundred eight million, five hundred thirty-eight thousand, forty-one".