164312523 has 16 divisors (see below), whose sum is σ = 250006560. Its totient is φ = 106580448.

The previous prime is 164312441. The next prime is 164312539. The reversal of 164312523 is 325213461.

164312523 is a `hidden beast` number, since 1 + 643 + 12 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 164312523 - 2⁹ = 164312011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (164312563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81240 + ... + 83237.

It is an arithmetic number, because the mean of its divisors is an integer number (15625410).

Almost surely, 2^164312523 is an apocalyptic number.

164312523 is a deficient number, since it is larger than the sum of its proper divisors (85694037).

164312523 is a wasteful number, since it uses less digits than its factorization.

164312523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164523 (or 164517 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 164312523 is about 12818.4446404390. Note that the first 3 decimals coincide. The cubic root of 164312523 is about 547.7178416295.

Adding to 164312523 its reverse (325213461), we get a palindrome (489525984).

The spelling of 164312523 in words is "one hundred sixty-four million, three hundred twelve thousand, five hundred twenty-three".