164326551 has 4 divisors (see below), whose sum is σ = 219102072. Its totient is φ = 109551032.

The previous prime is 164326543. The next prime is 164326609. The reversal of 164326551 is 155623461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164326551 - 2³ = 164326543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164326511) 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, 27387756 + ... + 27387761.

It is an arithmetic number, because the mean of its divisors is an integer number (54775518).

Almost surely, 2^164326551 is an apocalyptic number.

164326551 is a deficient number, since it is larger than the sum of its proper divisors (54775521).

164326551 is an equidigital number, since it uses as much as digits as its factorization.

164326551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54775520.

The product of its digits is 21600, while the sum is 33.

The square root of 164326551 is about 12818.9918090308. The cubic root of 164326551 is about 547.7334281210.

The spelling of 164326551 in words is "one hundred sixty-four million, three hundred twenty-six thousand, five hundred fifty-one".