213154523 has 2 divisors, whose sum is σ = 213154524. Its totient is φ = 213154522.

The previous prime is 213154519. The next prime is 213154549. The reversal of 213154523 is 325451312.

It is a happy number.

It is an a-pointer prime, because the next prime (213154549) can be obtained adding 213154523 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213154523 - 2² = 213154519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213154492 and 213154501.

It is not a weakly prime, because it can be changed into another prime (213154573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106577261 + 106577262.

It is an arithmetic number, because the mean of its divisors is an integer number (106577262).

Almost surely, 2^213154523 is an apocalyptic number.

213154523 is a deficient number, since it is larger than the sum of its proper divisors (1).

213154523 is an equidigital number, since it uses as much as digits as its factorization.

213154523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 213154523 is about 14599.8124303020. The cubic root of 213154523 is about 597.3536442362.

The spelling of 213154523 in words is "two hundred thirteen million, one hundred fifty-four thousand, five hundred twenty-three".