213724601 has 4 divisors (see below), whose sum is σ = 213932532. Its totient is φ = 213516672.

The previous prime is 213724549. The next prime is 213724603. The reversal of 213724601 is 106427312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151314601 + 62410000 = 12301^2 + 7900^2 .

It is a cyclic number.

It is not a de Polignac number, because 213724601 - 2¹⁰ = 213723577 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (213724603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102416 + ... + 104481.

It is an arithmetic number, because the mean of its divisors is an integer number (53483133).

Almost surely, 2^213724601 is an apocalyptic number.

It is an amenable number.

213724601 is a deficient number, since it is larger than the sum of its proper divisors (207931).

213724601 is a wasteful number, since it uses less digits than its factorization.

213724601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207930.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 213724601 is about 14619.3228639359. The cubic root of 213724601 is about 597.8857074369.

The spelling of 213724601 in words is "two hundred thirteen million, seven hundred twenty-four thousand, six hundred one".