2197021845 has 8 divisors (see below), whose sum is σ = 3515234976. Its totient is φ = 1171744976.

The previous prime is 2197021781. The next prime is 2197021867. The reversal of 2197021845 is 5481207912.

2197021845 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 2197021845 - 2⁶ = 2197021781 is a prime.

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, 73234047 + ... + 73234076.

It is an arithmetic number, because the mean of its divisors is an integer number (439404372).

Almost surely, 2^2197021845 is an apocalyptic number.

It is an amenable number.

2197021845 is a deficient number, since it is larger than the sum of its proper divisors (1318213131).

2197021845 is a wasteful number, since it uses less digits than its factorization.

2197021845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146468131.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 2197021845 is about 46872.3996078716. The cubic root of 2197021845 is about 1300.0043086642.

The spelling of 2197021845 in words is "two billion, one hundred ninety-seven million, twenty-one thousand, eight hundred forty-five".