52161725 has 60 divisors (see below), whose sum is σ = 83357760. Its totient is φ = 32104800.

The previous prime is 52161721. The next prime is 52161727. The reversal of 52161725 is 52716125.

It is not a de Polignac number, because 52161725 - 2² = 52161721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52161721) 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 59 ways as a sum of consecutive naturals, for example, 660236 + ... + 660314.

It is an arithmetic number, because the mean of its divisors is an integer number (1389296).

Almost surely, 2^52161725 is an apocalyptic number.

52161725 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

52161725 is a deficient number, since it is larger than the sum of its proper divisors (31196035).

52161725 is an equidigital number, since it uses as much as digits as its factorization.

52161725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 102 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 52161725 is about 7222.3074567620. The cubic root of 52161725 is about 373.6376641770.

The spelling of 52161725 in words is "fifty-two million, one hundred sixty-one thousand, seven hundred twenty-five".