213640269 has 8 divisors (see below), whose sum is σ = 287790720. Its totient is φ = 140958336.

The previous prime is 213640249. The next prime is 213640291. The reversal of 213640269 is 962046312.

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

It is not a de Polignac number, because 213640269 - 2⁹ = 213639757 is a prime.

It is a super-2 number, since 2×213640269² = 91284329076784722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213640249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366789 + ... + 367370.

It is an arithmetic number, because the mean of its divisors is an integer number (35973840).

Almost surely, 2^213640269 is an apocalyptic number.

It is an amenable number.

213640269 is a deficient number, since it is larger than the sum of its proper divisors (74150451).

213640269 is an equidigital number, since it uses as much as digits as its factorization.

213640269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734259.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 213640269 is about 14616.4383144458. The cubic root of 213640269 is about 597.8070586674.

The spelling of 213640269 in words is "two hundred thirteen million, six hundred forty thousand, two hundred sixty-nine".