216161623 has 2 divisors, whose sum is σ = 216161624. Its totient is φ = 216161622.

The previous prime is 216161587. The next prime is 216161633. The reversal of 216161623 is 326161612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216161623 - 2⁹ = 216161111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216161591 and 216161600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216161633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108080811 + 108080812.

It is an arithmetic number, because the mean of its divisors is an integer number (108080812).

Almost surely, 2^216161623 is an apocalyptic number.

216161623 is a deficient number, since it is larger than the sum of its proper divisors (1).

216161623 is an equidigital number, since it uses as much as digits as its factorization.

216161623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 216161623 is about 14702.4359546301. The cubic root of 216161623 is about 600.1496136158.

The spelling of 216161623 in words is "two hundred sixteen million, one hundred sixty-one thousand, six hundred twenty-three".