2145217236 has 36 divisors (see below), whose sum is σ = 5172211296. Its totient is φ = 692001840.

The previous prime is 2145217183. The next prime is 2145217247. The reversal of 2145217236 is 6327125412.

It is a junction number, because it is equal to n+sod(n) for n = 2145217197 and 2145217206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81480 + ... + 104543.

It is an arithmetic number, because the mean of its divisors is an integer number (143672536).

Almost surely, 2^2145217236 is an apocalyptic number.

It is an amenable number.

2145217236 is an abundant number, since it is smaller than the sum of its proper divisors (3026994060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145217236 is a wasteful number, since it uses less digits than its factorization.

2145217236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186092 (or 186059 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 2145217236 is about 46316.4898929096. The cubic root of 2145217236 is about 1289.7051257989.

The spelling of 2145217236 in words is "two billion, one hundred forty-five million, two hundred seventeen thousand, two hundred thirty-six".