213648427 has 2 divisors, whose sum is σ = 213648428. Its totient is φ = 213648426.

The previous prime is 213648341. The next prime is 213648433. The reversal of 213648427 is 724846312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213648427 is a prime.

It is not a weakly prime, because it can be changed into another prime (213648437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106824213 + 106824214.

It is an arithmetic number, because the mean of its divisors is an integer number (106824214).

Almost surely, 2^213648427 is an apocalyptic number.

213648427 is a deficient number, since it is larger than the sum of its proper divisors (1).

213648427 is an equidigital number, since it uses as much as digits as its factorization.

213648427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 37.

The square root of 213648427 is about 14616.7173811359. The cubic root of 213648427 is about 597.8146677945.

It can be divided in two parts, 21364 and 8427, that added together give a cube (29791 = 31³).

The spelling of 213648427 in words is "two hundred thirteen million, six hundred forty-eight thousand, four hundred twenty-seven".