213125623 has 2 divisors, whose sum is σ = 213125624. Its totient is φ = 213125622.

The previous prime is 213125609. The next prime is 213125639. The reversal of 213125623 is 326521312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213125623 - 2⁹ = 213125111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213125663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106562811 + 106562812.

It is an arithmetic number, because the mean of its divisors is an integer number (106562812).

Almost surely, 2^213125623 is an apocalyptic number.

213125623 is a deficient number, since it is larger than the sum of its proper divisors (1).

213125623 is an equidigital number, since it uses as much as digits as its factorization.

213125623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 213125623 is about 14598.8226580091. The cubic root of 213125623 is about 597.3266461374.

Adding to 213125623 its reverse (326521312), we get a palindrome (539646935).

The spelling of 213125623 in words is "two hundred thirteen million, one hundred twenty-five thousand, six hundred twenty-three".