213277645 has 24 divisors (see below), whose sum is σ = 298426464. Its totient is φ = 145899936.

The previous prime is 213277639. The next prime is 213277661. The reversal of 213277645 is 546772312.

It is a happy number.

It is not a de Polignac number, because 213277645 - 2³ = 213277637 is a prime.

It is a super-3 number, since 3×213277645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143074 + ... + 144556.

It is an arithmetic number, because the mean of its divisors is an integer number (12434436).

Almost surely, 2^213277645 is an apocalyptic number.

It is an amenable number.

213277645 is a deficient number, since it is larger than the sum of its proper divisors (85148819).

213277645 is a wasteful number, since it uses less digits than its factorization.

213277645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089 (or 2082 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 213277645 is about 14604.0283826073. The cubic root of 213277645 is about 597.4686362744.

The spelling of 213277645 in words is "two hundred thirteen million, two hundred seventy-seven thousand, six hundred forty-five".