164137525 has 6 divisors (see below), whose sum is σ = 203530562. Its totient is φ = 131310000.

The previous prime is 164137517. The next prime is 164137553. The reversal of 164137525 is 525731461.

It can be written as a sum of positive squares in 3 ways, for example, as 44169316 + 119968209 = 6646^2 + 10953^2 .

It is not a de Polignac number, because 164137525 - 2³ = 164137517 is a prime.

It is a super-2 number, since 2×164137525² = 53882254226251250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3282726 + ... + 3282775.

Almost surely, 2^164137525 is an apocalyptic number.

It is an amenable number.

164137525 is a deficient number, since it is larger than the sum of its proper divisors (39393037).

164137525 is an equidigital number, since it uses as much as digits as its factorization.

164137525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6565511 (or 6565506 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 164137525 is about 12811.6167988275. The cubic root of 164137525 is about 547.5233269879.

Adding to 164137525 its reverse (525731461), we get a palindrome (689868986).

The spelling of 164137525 in words is "one hundred sixty-four million, one hundred thirty-seven thousand, five hundred twenty-five".