1845471213 has 12 divisors (see below), whose sum is σ = 2730697788. Its totient is φ = 1200306240.

The previous prime is 1845471209. The next prime is 1845471253. The reversal of 1845471213 is 3121745481.

1845471213 is a `hidden beast` number, since 184 + 5 + 471 + 2 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 288932004 + 1556539209 = 16998^2 + 39453^2 .

It is not a de Polignac number, because 1845471213 - 2² = 1845471209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845471203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2500270 + ... + 2501007.

It is an arithmetic number, because the mean of its divisors is an integer number (227558149).

Almost surely, 2^1845471213 is an apocalyptic number.

It is an amenable number.

1845471213 is a deficient number, since it is larger than the sum of its proper divisors (885226575).

1845471213 is a wasteful number, since it uses less digits than its factorization.

1845471213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001324 (or 5001321 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 1845471213 is about 42958.9479968958. The cubic root of 1845471213 is about 1226.5984881159.

The spelling of 1845471213 in words is "one billion, eight hundred forty-five million, four hundred seventy-one thousand, two hundred thirteen".