413873867221 has 4 divisors (see below), whose sum is σ = 416894844492. Its totient is φ = 410852889952.

The previous prime is 413873867213. The next prime is 413873867237. The reversal of 413873867221 is 122768378314.

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 263728467025 + 150145400196 = 513545^2 + 387486^2 .

It is a cyclic number.

It is not a de Polignac number, because 413873867221 - 2³ = 413873867213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (413873867021) 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, 1510488430 + ... + 1510488703.

It is an arithmetic number, because the mean of its divisors is an integer number (104223711123).

Almost surely, 2^413873867221 is an apocalyptic number.

It is an amenable number.

413873867221 is a deficient number, since it is larger than the sum of its proper divisors (3020977271).

413873867221 is a wasteful number, since it uses less digits than its factorization.

413873867221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020977270.

The product of its digits is 2709504, while the sum is 52.

The spelling of 413873867221 in words is "four hundred thirteen billion, eight hundred seventy-three million, eight hundred sixty-seven thousand, two hundred twenty-one".