52161500 has 24 divisors (see below), whose sum is σ = 113921808. Its totient is φ = 20864400.

The previous prime is 52161497. The next prime is 52161503. The reversal of 52161500 is 516125.

It is an interprime number because it is at equal distance from previous prime (52161497) and next prime (52161503).

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52161503) 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 7 ways as a sum of consecutive naturals, for example, 51662 + ... + 52661.

It is an arithmetic number, because the mean of its divisors is an integer number (4746742).

Almost surely, 2^52161500 is an apocalyptic number.

52161500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

52161500 is an abundant number, since it is smaller than the sum of its proper divisors (61760308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52161500 is a wasteful number, since it uses less digits than its factorization.

52161500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104342 (or 104330 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 52161500 is about 7222.2918800060. The cubic root of 52161500 is about 373.6371269466.

Adding to 52161500 its reverse (516125), we get a palindrome (52677625).

The spelling of 52161500 in words is "fifty-two million, one hundred sixty-one thousand, five hundred".