213749146 has 16 divisors (see below), whose sum is σ = 345588264. Its totient is φ = 98567424.

The previous prime is 213749117. The next prime is 213749147. The reversal of 213749146 is 641947312.

213749146 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 113529025 + 100220121 = 10655^2 + 10011^2 .

It is not an unprimeable number, because it can be changed into a prime (213749147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34390 + ... + 40126.

Almost surely, 2^213749146 is an apocalyptic number.

213749146 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213749146 is a deficient number, since it is larger than the sum of its proper divisors (131839118).

213749146 is a wasteful number, since it uses less digits than its factorization.

213749146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7185.

The product of its digits is 36288, while the sum is 37.

The square root of 213749146 is about 14620.1623110005. The cubic root of 213749146 is about 597.9085944340.

The spelling of 213749146 in words is "two hundred thirteen million, seven hundred forty-nine thousand, one hundred forty-six".