213876945 has 12 divisors (see below), whose sum is σ = 370720116. Its totient is φ = 114067680.

The previous prime is 213876941. The next prime is 213876961. The reversal of 213876945 is 549678312.

213876945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 139641489 + 74235456 = 11817^2 + 8616^2 .

It is not a de Polignac number, because 213876945 - 2² = 213876941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4752821 = 213876945 / (2 + 1 + 3 + 8 + 7 + 6 + 9 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 213876945.

It is not an unprimeable number, because it can be changed into a prime (213876941) 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, 2376366 + ... + 2376455.

It is an arithmetic number, because the mean of its divisors is an integer number (30893343).

Almost surely, 2^213876945 is an apocalyptic number.

It is an amenable number.

213876945 is a deficient number, since it is larger than the sum of its proper divisors (156843171).

213876945 is a wasteful number, since it uses less digits than its factorization.

213876945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4752832 (or 4752829 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 213876945 is about 14624.5323002139. The cubic root of 213876945 is about 598.0277323709.

The spelling of 213876945 in words is "two hundred thirteen million, eight hundred seventy-six thousand, nine hundred forty-five".