213975727 has 4 divisors (see below), whose sum is σ = 244543696. Its totient is φ = 183407760.

The previous prime is 213975721. The next prime is 213975731. The reversal of 213975727 is 727579312.

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

It is a cyclic number.

It is not a de Polignac number, because 213975727 - 2¹⁵ = 213942959 is a prime.

It is a super-2 number, since 2×213975727² = 91571223490357058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213975721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15283974 + ... + 15283987.

It is an arithmetic number, because the mean of its divisors is an integer number (61135924).

Almost surely, 2^213975727 is an apocalyptic number.

213975727 is a deficient number, since it is larger than the sum of its proper divisors (30567969).

213975727 is an equidigital number, since it uses as much as digits as its factorization.

213975727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30567968.

The product of its digits is 185220, while the sum is 43.

The square root of 213975727 is about 14627.9091807408. The cubic root of 213975727 is about 598.1197873031.

The spelling of 213975727 in words is "two hundred thirteen million, nine hundred seventy-five thousand, seven hundred twenty-seven".