201640125 has 32 divisors (see below), whose sum is σ = 336510720. Its totient is φ = 107227200.

The previous prime is 201640123. The next prime is 201640169. The reversal of 201640125 is 521046102.

It is not a de Polignac number, because 201640125 - 2¹ = 201640123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201640123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188091 + ... + 189159.

It is an arithmetic number, because the mean of its divisors is an integer number (10515960).

Almost surely, 2^201640125 is an apocalyptic number.

201640125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201640125 is a deficient number, since it is larger than the sum of its proper divisors (134870595).

201640125 is a wasteful number, since it uses less digits than its factorization.

201640125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 201640125 is about 14200.0044014078. The cubic root of 201640125 is about 586.3977825087.

Adding to 201640125 its reverse (521046102), we get a palindrome (722686227).

The spelling of 201640125 in words is "two hundred one million, six hundred forty thousand, one hundred twenty-five".