213931427 has 2 divisors, whose sum is σ = 213931428. Its totient is φ = 213931426.

The previous prime is 213931409. The next prime is 213931489. The reversal of 213931427 is 724139312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213931427 - 2⁶ = 213931363 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213931393 and 213931402.

It is not a weakly prime, because it can be changed into another prime (213933427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106965713 + 106965714.

It is an arithmetic number, because the mean of its divisors is an integer number (106965714).

Almost surely, 2^213931427 is an apocalyptic number.

213931427 is a deficient number, since it is larger than the sum of its proper divisors (1).

213931427 is an equidigital number, since it uses as much as digits as its factorization.

213931427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 213931427 is about 14626.3948736522. The cubic root of 213931427 is about 598.0785076437.

The spelling of 213931427 in words is "two hundred thirteen million, nine hundred thirty-one thousand, four hundred twenty-seven".