216334451 has 2 divisors, whose sum is σ = 216334452. Its totient is φ = 216334450.

The previous prime is 216334429. The next prime is 216334471. The reversal of 216334451 is 154433612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216334451 - 2¹⁰ = 216333427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216334471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108167225 + 108167226.

It is an arithmetic number, because the mean of its divisors is an integer number (108167226).

Almost surely, 2^216334451 is an apocalyptic number.

216334451 is a deficient number, since it is larger than the sum of its proper divisors (1).

216334451 is an equidigital number, since it uses as much as digits as its factorization.

216334451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 216334451 is about 14708.3123097111. The cubic root of 216334451 is about 600.3095171563.

The spelling of 216334451 in words is "two hundred sixteen million, three hundred thirty-four thousand, four hundred fifty-one".