212147623 has 2 divisors, whose sum is σ = 212147624. Its totient is φ = 212147622.

The previous prime is 212147587. The next prime is 212147647. The reversal of 212147623 is 326741212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212147623 - 2¹⁷ = 212016551 is a prime.

It is a super-2 number, since 2×212147623² = 90013227889100258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212147591 and 212147600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212147123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106073811 + 106073812.

It is an arithmetic number, because the mean of its divisors is an integer number (106073812).

Almost surely, 2^212147623 is an apocalyptic number.

212147623 is a deficient number, since it is larger than the sum of its proper divisors (1).

212147623 is an equidigital number, since it uses as much as digits as its factorization.

212147623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 212147623 is about 14565.2882910020. The cubic root of 212147623 is about 596.4115656086.

Adding to 212147623 its reverse (326741212), we get a palindrome (538888835).

The spelling of 212147623 in words is "two hundred twelve million, one hundred forty-seven thousand, six hundred twenty-three".