213273445 has 32 divisors (see below), whose sum is σ = 320495616. Its totient is φ = 132360000.

The previous prime is 213273413. The next prime is 213273469. The reversal of 213273445 is 544372312.

It is a happy number.

It is not a de Polignac number, because 213273445 - 2⁵ = 213273413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95532 + ... + 97738.

It is an arithmetic number, because the mean of its divisors is an integer number (10015488).

Almost surely, 2^213273445 is an apocalyptic number.

It is an amenable number.

213273445 is a deficient number, since it is larger than the sum of its proper divisors (107222171).

213273445 is a wasteful number, since it uses less digits than its factorization.

213273445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481.

The product of its digits is 20160, while the sum is 31.

The square root of 213273445 is about 14603.8845859586. The cubic root of 213273445 is about 597.4647143369.

The spelling of 213273445 in words is "two hundred thirteen million, two hundred seventy-three thousand, four hundred forty-five".