2145226645 has 8 divisors (see below), whose sum is σ = 2576939904. Its totient is φ = 1714402704.

The previous prime is 2145226639. The next prime is 2145226679. The reversal of 2145226645 is 5466225412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145226645 - 2³ = 2145226637 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 217009 + ... + 226678.

It is an arithmetic number, because the mean of its divisors is an integer number (322117488).

Almost surely, 2^2145226645 is an apocalyptic number.

It is an amenable number.

2145226645 is a deficient number, since it is larger than the sum of its proper divisors (431713259).

2145226645 is an equidigital number, since it uses as much as digits as its factorization.

2145226645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444659.

The product of its digits is 115200, while the sum is 37.

The square root of 2145226645 is about 46316.5914656940. The cubic root of 2145226645 is about 1289.7070113606.

The spelling of 2145226645 in words is "two billion, one hundred forty-five million, two hundred twenty-six thousand, six hundred forty-five".