2117522405 has 16 divisors (see below), whose sum is σ = 2561367744. Its totient is φ = 1680497280.

The previous prime is 2117522387. The next prime is 2117522411. The reversal of 2117522405 is 5042257112.

It is a happy number.

It is not a de Polignac number, because 2117522405 - 2¹² = 2117518309 is a prime.

It is a super-2 number, since 2×2117522405² = 8967802271353968050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500750 + ... + 504960.

It is an arithmetic number, because the mean of its divisors is an integer number (160085484).

Almost surely, 2^2117522405 is an apocalyptic number.

It is an amenable number.

2117522405 is a deficient number, since it is larger than the sum of its proper divisors (443845339).

2117522405 is a wasteful number, since it uses less digits than its factorization.

2117522405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4996.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2117522405 is about 46016.5449050665. The cubic root of 2117522405 is about 1284.1310228595.

Adding to 2117522405 its reverse (5042257112), we get a palindrome (7159779517).

The spelling of 2117522405 in words is "two billion, one hundred seventeen million, five hundred twenty-two thousand, four hundred five".