213367645 has 8 divisors (see below), whose sum is σ = 264870360. Its totient is φ = 164808000.

The previous prime is 213367633. The next prime is 213367657. The reversal of 213367645 is 546763312.

It is an interprime number because it is at equal distance from previous prime (213367633) and next prime (213367657).

It can be written as a sum of positive squares in 4 ways, for example, as 2595321 + 210772324 = 1611^2 + 14518^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213367645 - 2⁵ = 213367613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735606 + ... + 735895.

It is an arithmetic number, because the mean of its divisors is an integer number (33108795).

Almost surely, 2^213367645 is an apocalyptic number.

It is an amenable number.

213367645 is a deficient number, since it is larger than the sum of its proper divisors (51502715).

213367645 is a wasteful number, since it uses less digits than its factorization.

213367645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471535.

The product of its digits is 90720, while the sum is 37.

The square root of 213367645 is about 14607.1093991933. The cubic root of 213367645 is about 597.5526654207.

The spelling of 213367645 in words is "two hundred thirteen million, three hundred sixty-seven thousand, six hundred forty-five".