213730278 has 32 divisors (see below), whose sum is σ = 462128640. Its totient is φ = 65668320.

The previous prime is 213730277. The next prime is 213730289. The reversal of 213730278 is 872037312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213730277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21118 + ... + 29553.

It is an arithmetic number, because the mean of its divisors is an integer number (14441520).

Almost surely, 2^213730278 is an apocalyptic number.

213730278 is an abundant number, since it is smaller than the sum of its proper divisors (248398362).

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

213730278 is a wasteful number, since it uses less digits than its factorization.

213730278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50732.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 213730278 is about 14619.5170234861. The cubic root of 213730278 is about 597.8910011141.

The spelling of 213730278 in words is "two hundred thirteen million, seven hundred thirty thousand, two hundred seventy-eight".