213090812 has 24 divisors (see below), whose sum is σ = 413483952. Its totient is φ = 95270400.

The previous prime is 213090803. The next prime is 213090827. The reversal of 213090812 is 218090312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37013 + ... + 42380.

It is an arithmetic number, because the mean of its divisors is an integer number (17228498).

Almost surely, 2^213090812 is an apocalyptic number.

213090812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213090812 is a deficient number, since it is larger than the sum of its proper divisors (200393140).

213090812 is a wasteful number, since it uses less digits than its factorization.

213090812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79469 (or 79467 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 213090812 is about 14597.6303556433. The cubic root of 213090812 is about 597.2941227993.

The spelling of 213090812 in words is "two hundred thirteen million, ninety thousand, eight hundred twelve".