164442551 has 8 divisors (see below), whose sum is σ = 202390944. Its totient is φ = 130108320.

The previous prime is 164442539. The next prime is 164442559. The reversal of 164442551 is 155244461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164442551 - 2²² = 160248247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164442559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903440 + ... + 903621.

It is an arithmetic number, because the mean of its divisors is an integer number (25298868).

Almost surely, 2^164442551 is an apocalyptic number.

164442551 is a deficient number, since it is larger than the sum of its proper divisors (37948393).

164442551 is a wasteful number, since it uses less digits than its factorization.

164442551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807081.

The product of its digits is 19200, while the sum is 32.

The square root of 164442551 is about 12823.5155476180. The cubic root of 164442551 is about 547.8622815790.

The spelling of 164442551 in words is "one hundred sixty-four million, four hundred forty-two thousand, five hundred fifty-one".