164422451 has 2 divisors, whose sum is σ = 164422452. Its totient is φ = 164422450.

The previous prime is 164422441. The next prime is 164422459. The reversal of 164422451 is 154224461.

It is a strong prime.

It is an emirp because it is prime and its reverse (154224461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164422451 is a prime.

It is a super-3 number, since 3×164422451³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (164422459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82211225 + 82211226.

It is an arithmetic number, because the mean of its divisors is an integer number (82211226).

Almost surely, 2^164422451 is an apocalyptic number.

164422451 is the 5735-th centered decagonal number.

164422451 is a deficient number, since it is larger than the sum of its proper divisors (1).

164422451 is an equidigital number, since it uses as much as digits as its factorization.

164422451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 29.

The square root of 164422451 is about 12822.7318072242. The cubic root of 164422451 is about 547.8399587262.

The spelling of 164422451 in words is "one hundred sixty-four million, four hundred twenty-two thousand, four hundred fifty-one".