1166172215 has 32 divisors (see below), whose sum is σ = 1641124800. Its totient is φ = 787691520.

The previous prime is 1166172211. The next prime is 1166172257. The reversal of 1166172215 is 5122716611.

It is not a de Polignac number, because 1166172215 - 2² = 1166172211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166172211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19535 + ... + 52095.

It is an arithmetic number, because the mean of its divisors is an integer number (51285150).

Almost surely, 2^1166172215 is an apocalyptic number.

1166172215 is a deficient number, since it is larger than the sum of its proper divisors (474952585).

1166172215 is a wasteful number, since it uses less digits than its factorization.

1166172215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32627.

The product of its digits is 5040, while the sum is 32.

The square root of 1166172215 is about 34149.2637548747. The cubic root of 1166172215 is about 1052.5778579025.

Adding to 1166172215 its reverse (5122716611), we get a palindrome (6288888826).

The spelling of 1166172215 in words is "one billion, one hundred sixty-six million, one hundred seventy-two thousand, two hundred fifteen".