213077284 has 18 divisors (see below), whose sum is σ = 433764870. Its totient is φ = 91318752.

The previous prime is 213077279. The next prime is 213077309. The reversal of 213077284 is 482770312.

It can be written as a sum of positive squares in only one way, i.e., 206726884 + 6350400 = 14378^2 + 2520^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 543369 + ... + 543760.

Almost surely, 2^213077284 is an apocalyptic number.

It is an amenable number.

213077284 is an abundant number, since it is smaller than the sum of its proper divisors (220687586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213077284 is a wasteful number, since it uses less digits than its factorization.

213077284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087147 (or 1087138 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 213077284 is about 14597.1669854119. The cubic root of 213077284 is about 597.2814828583.

The spelling of 213077284 in words is "two hundred thirteen million, seventy-seven thousand, two hundred eighty-four".