164163251 has 4 divisors (see below), whose sum is σ = 187615152. Its totient is φ = 140711352.

The previous prime is 164163217. The next prime is 164163253. The reversal of 164163251 is 152361461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152361461 = 7 ⋅21765923.

It is a cyclic number.

It is not a de Polignac number, because 164163251 - 2⁶ = 164163187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164163253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11725940 + ... + 11725953.

It is an arithmetic number, because the mean of its divisors is an integer number (46903788).

Almost surely, 2^164163251 is an apocalyptic number.

164163251 is a deficient number, since it is larger than the sum of its proper divisors (23451901).

164163251 is an equidigital number, since it uses as much as digits as its factorization.

164163251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23451900.

The product of its digits is 4320, while the sum is 29.

The square root of 164163251 is about 12812.6207701625. The cubic root of 164163251 is about 547.5519307441.

The spelling of 164163251 in words is "one hundred sixty-four million, one hundred sixty-three thousand, two hundred fifty-one".