213081145 has 24 divisors (see below), whose sum is σ = 273559104. Its totient is φ = 159296256.

The previous prime is 213081139. The next prime is 213081149. The reversal of 213081145 is 541180312.

It is not a de Polignac number, because 213081145 - 2⁷ = 213081017 is a prime.

It is a super-2 number, since 2×213081145² = 90807148709022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213081149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240874 + ... + 241756.

It is an arithmetic number, because the mean of its divisors is an integer number (11398296).

Almost surely, 2^213081145 is an apocalyptic number.

It is an amenable number.

213081145 is a deficient number, since it is larger than the sum of its proper divisors (60477959).

213081145 is a wasteful number, since it uses less digits than its factorization.

213081145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 213081145 is about 14597.2992365026. The cubic root of 213081145 is about 597.2850904537.

The spelling of 213081145 in words is "two hundred thirteen million, eighty-one thousand, one hundred forty-five".