52172505 has 120 divisors (see below), whose sum is σ = 119180160. Its totient is φ = 21591360.

The previous prime is 52172503. The next prime is 52172509. The reversal of 52172505 is 50527125.

It is a happy number.

52172505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52172505 - 2¹ = 52172503 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52172503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 218176 + ... + 218414.

It is an arithmetic number, because the mean of its divisors is an integer number (993168).

Almost surely, 2^52172505 is an apocalyptic number.

52172505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

52172505 is an abundant number, since it is smaller than the sum of its proper divisors (67007655).

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

52172505 is a wasteful number, since it uses less digits than its factorization.

52172505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 52172505 is about 7223.0537170922. The cubic root of 52172505 is about 373.6634016731.

The spelling of 52172505 in words is "fifty-two million, one hundred seventy-two thousand, five hundred five".