2845156221 has 6 divisors (see below), whose sum is σ = 4109670110. Its totient is φ = 1896770808.

The previous prime is 2845156219. The next prime is 2845156267. The reversal of 2845156221 is 1226515482.

2845156221 is a `hidden beast` number, since 2 + 84 + 515 + 62 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2321890596 + 523265625 = 48186^2 + 22875^2 .

It is not a de Polignac number, because 2845156221 - 2¹ = 2845156219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2845156211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158064226 + ... + 158064243.

Almost surely, 2^2845156221 is an apocalyptic number.

It is an amenable number.

2845156221 is a deficient number, since it is larger than the sum of its proper divisors (1264513889).

2845156221 is a wasteful number, since it uses less digits than its factorization.

2845156221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316128475 (or 316128472 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 2845156221 is about 53340.0058211470. The cubic root of 2845156221 is about 1416.9962660520.

The spelling of 2845156221 in words is "two billion, eight hundred forty-five million, one hundred fifty-six thousand, two hundred twenty-one".