213810745 has 16 divisors (see below), whose sum is σ = 262429632. Its totient is φ = 167169600.

The previous prime is 213810721. The next prime is 213810761. The reversal of 213810745 is 547018312.

It is a de Polignac number, because none of the positive numbers 2^k-213810745 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73570 + ... + 76420.

It is an arithmetic number, because the mean of its divisors is an integer number (16401852).

Almost surely, 2^213810745 is an apocalyptic number.

It is an amenable number.

213810745 is a deficient number, since it is larger than the sum of its proper divisors (48618887).

213810745 is a wasteful number, since it uses less digits than its factorization.

213810745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 213810745 is about 14622.2688048059. The cubic root of 213810745 is about 597.9660247361.

The spelling of 213810745 in words is "two hundred thirteen million, eight hundred ten thousand, seven hundred forty-five".