213630427 has 2 divisors, whose sum is σ = 213630428. Its totient is φ = 213630426.

The previous prime is 213630419. The next prime is 213630467. The reversal of 213630427 is 724036312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213630427 - 2³ = 213630419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213630395 and 213630404.

It is not a weakly prime, because it can be changed into another prime (213630467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106815213 + 106815214.

It is an arithmetic number, because the mean of its divisors is an integer number (106815214).

Almost surely, 2^213630427 is an apocalyptic number.

213630427 is a deficient number, since it is larger than the sum of its proper divisors (1).

213630427 is an equidigital number, since it uses as much as digits as its factorization.

213630427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 213630427 is about 14616.1016348409. The cubic root of 213630427 is about 597.7978785825.

Adding to 213630427 its reverse (724036312), we get a palindrome (937666739).

The spelling of 213630427 in words is "two hundred thirteen million, six hundred thirty thousand, four hundred twenty-seven".