213640757 has 8 divisors (see below), whose sum is σ = 233267040. Its totient is φ = 194048560.

The previous prime is 213640663. The next prime is 213640781. The reversal of 213640757 is 757046312.

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

It is a cyclic number.

It is not a de Polignac number, because 213640757 - 2¹⁴ = 213624373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213640057) 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 7 ways as a sum of consecutive naturals, for example, 5618 + ... + 21420.

It is an arithmetic number, because the mean of its divisors is an integer number (29158380).

Almost surely, 2^213640757 is an apocalyptic number.

It is an amenable number.

213640757 is a deficient number, since it is larger than the sum of its proper divisors (19626283).

213640757 is a wasteful number, since it uses less digits than its factorization.

213640757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17043.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 213640757 is about 14616.4550079696. The cubic root of 213640757 is about 597.8075138401.

The spelling of 213640757 in words is "two hundred thirteen million, six hundred forty thousand, seven hundred fifty-seven".