164952381 has 8 divisors (see below), whose sum is σ = 239930784. Its totient is φ = 99971120.

The previous prime is 164952373. The next prime is 164952397. The reversal of 164952381 is 183259461.

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 164952381 - 2³ = 164952373 is a prime.

It is a super-2 number, since 2×164952381² = 54418575995138322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164952301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2499246 + ... + 2499311.

It is an arithmetic number, because the mean of its divisors is an integer number (29991348).

Almost surely, 2^164952381 is an apocalyptic number.

164952381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164952381 is a deficient number, since it is larger than the sum of its proper divisors (74978403).

164952381 is a wasteful number, since it uses less digits than its factorization.

164952381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998571.

The product of its digits is 51840, while the sum is 39.

The square root of 164952381 is about 12843.3788778499. The cubic root of 164952381 is about 548.4278863275.

The spelling of 164952381 in words is "one hundred sixty-four million, nine hundred fifty-two thousand, three hundred eighty-one".