164238615 has 24 divisors (see below), whose sum is σ = 301427568. Its totient is φ = 82440960.

The previous prime is 164238611. The next prime is 164238619. The reversal of 164238615 is 516832461.

It is a happy number.

164238615 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 38 + 615 = 666.

It is an interprime number because it is at equal distance from previous prime (164238611) and next prime (164238619).

It is not a de Polignac number, because 164238615 - 2² = 164238611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164238615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164238611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106581 + ... + 108110.

It is an arithmetic number, because the mean of its divisors is an integer number (12559482).

Almost surely, 2^164238615 is an apocalyptic number.

164238615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164238615 is a deficient number, since it is larger than the sum of its proper divisors (137188953).

164238615 is a wasteful number, since it uses less digits than its factorization.

164238615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214719 (or 214716 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 164238615 is about 12815.5614391255. The cubic root of 164238615 is about 547.6357078995.

The spelling of 164238615 in words is "one hundred sixty-four million, two hundred thirty-eight thousand, six hundred fifteen".