168214451 has 2 divisors, whose sum is σ = 168214452. Its totient is φ = 168214450.

The previous prime is 168214381. The next prime is 168214477. The reversal of 168214451 is 154412861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168214451 - 2¹⁴ = 168198067 is a prime.

It is a super-2 number, since 2×168214451² = 56592203050462802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168214481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84107225 + 84107226.

It is an arithmetic number, because the mean of its divisors is an integer number (84107226).

Almost surely, 2^168214451 is an apocalyptic number.

168214451 is a deficient number, since it is larger than the sum of its proper divisors (1).

168214451 is an equidigital number, since it uses as much as digits as its factorization.

168214451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The square root of 168214451 is about 12969.7513854353. The cubic root of 168214451 is about 552.0195187998.

The spelling of 168214451 in words is "one hundred sixty-eight million, two hundred fourteen thousand, four hundred fifty-one".