213760445 has 8 divisors (see below), whose sum is σ = 258866520. Its totient is φ = 169439040.

The previous prime is 213760423. The next prime is 213760453. The reversal of 213760445 is 544067312.

It can be written as a sum of positive squares in 4 ways, for example, as 3771364 + 209989081 = 1942^2 + 14491^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213760445 - 2¹⁰ = 213759421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195566 + ... + 196655.

It is an arithmetic number, because the mean of its divisors is an integer number (32358315).

Almost surely, 2^213760445 is an apocalyptic number.

It is an amenable number.

213760445 is a deficient number, since it is larger than the sum of its proper divisors (45106075).

213760445 is a wasteful number, since it uses less digits than its factorization.

213760445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392335.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 213760445 is about 14620.5487243126. The cubic root of 213760445 is about 597.9191296031.

The spelling of 213760445 in words is "two hundred thirteen million, seven hundred sixty thousand, four hundred forty-five".