213264340 has 12 divisors (see below), whose sum is σ = 447855156. Its totient is φ = 85305728.

The previous prime is 213264323. The next prime is 213264353. The reversal of 213264340 is 43462312.

It can be written as a sum of positive squares in 2 ways, for example, as 31877316 + 181387024 = 5646^2 + 13468^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5331589 + ... + 5331628.

It is an arithmetic number, because the mean of its divisors is an integer number (37321263).

Almost surely, 2^213264340 is an apocalyptic number.

213264340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213264340 is an abundant number, since it is smaller than the sum of its proper divisors (234590816).

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

213264340 is a wasteful number, since it uses less digits than its factorization.

213264340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10663226 (or 10663224 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 213264340 is about 14603.5728505048. The cubic root of 213264340 is about 597.4562119600.

The spelling of 213264340 in words is "two hundred thirteen million, two hundred sixty-four thousand, three hundred forty".