213506755 has 32 divisors (see below), whose sum is σ = 320537088. Its totient is φ = 132633600.

The previous prime is 213506747. The next prime is 213506767. The reversal of 213506755 is 557605312.

It is not a de Polignac number, because 213506755 - 2³ = 213506747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213506755.

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, 135120 + ... + 136690.

It is an arithmetic number, because the mean of its divisors is an integer number (10016784).

Almost surely, 2^213506755 is an apocalyptic number.

213506755 is a deficient number, since it is larger than the sum of its proper divisors (107030333).

213506755 is a wasteful number, since it uses less digits than its factorization.

213506755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947.

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 213506755 is about 14611.8703457155. The cubic root of 213506755 is about 597.6824999959.

The spelling of 213506755 in words is "two hundred thirteen million, five hundred six thousand, seven hundred fifty-five".