213627457 has 4 divisors (see below), whose sum is σ = 226193796. Its totient is φ = 201061120.

The previous prime is 213627451. The next prime is 213627467. The reversal of 213627457 is 754726312.

It is a happy number.

213627457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 14616²+1.

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 166306816 + 47320641 = 12896^2 + 6879^2 .

It is a cyclic number.

It is not a de Polignac number, because 213627457 - 2⁷ = 213627329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213627451) 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, 6283144 + ... + 6283177.

It is an arithmetic number, because the mean of its divisors is an integer number (56548449).

Almost surely, 2^213627457 is an apocalyptic number.

It is an amenable number.

213627457 is a deficient number, since it is larger than the sum of its proper divisors (12566339).

213627457 is a wasteful number, since it uses less digits than its factorization.

213627457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12566338.

The product of its digits is 70560, while the sum is 37.

The square root of 213627457 is about 14616.0000342091. Note that the first 4 decimals coincide. The cubic root of 213627457 is about 597.7951082719.

The spelling of 213627457 in words is "two hundred thirteen million, six hundred twenty-seven thousand, four hundred fifty-seven".