213423451 has 2 divisors, whose sum is σ = 213423452. Its totient is φ = 213423450.

The previous prime is 213423443. The next prime is 213423479. The reversal of 213423451 is 154324312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213423451 - 2³ = 213423443 is a prime.

It is not a weakly prime, because it can be changed into another prime (213423401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106711725 + 106711726.

It is an arithmetic number, because the mean of its divisors is an integer number (106711726).

Almost surely, 2^213423451 is an apocalyptic number.

213423451 is a deficient number, since it is larger than the sum of its proper divisors (1).

213423451 is an equidigital number, since it uses as much as digits as its factorization.

213423451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 213423451 is about 14609.0195085091. The cubic root of 213423451 is about 597.6047572256.

Adding to 213423451 its reverse (154324312), we get a palindrome (367747763).

The spelling of 213423451 in words is "two hundred thirteen million, four hundred twenty-three thousand, four hundred fifty-one".