213126945 has 32 divisors (see below), whose sum is σ = 356469120. Its totient is φ = 108595200.

The previous prime is 213126941. The next prime is 213126961. The reversal of 213126945 is 549621312.

It is not a de Polignac number, because 213126945 - 2² = 213126941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213126941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39670 + ... + 44720.

It is an arithmetic number, because the mean of its divisors is an integer number (11139660).

Almost surely, 2^213126945 is an apocalyptic number.

It is an amenable number.

213126945 is a deficient number, since it is larger than the sum of its proper divisors (143342175).

213126945 is a wasteful number, since it uses less digits than its factorization.

213126945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5185.

The product of its digits is 12960, while the sum is 33.

The square root of 213126945 is about 14598.8679355627. The cubic root of 213126945 is about 597.3278811902.

The spelling of 213126945 in words is "two hundred thirteen million, one hundred twenty-six thousand, nine hundred forty-five".