52161550 has 24 divisors (see below), whose sum is σ = 110881296. Its totient is φ = 17883840.

The previous prime is 52161547. The next prime is 52161563. The reversal of 52161550 is 5516125.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74167 + ... + 74866.

It is an arithmetic number, because the mean of its divisors is an integer number (4620054).

Almost surely, 2^52161550 is an apocalyptic number.

52161550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

52161550 is an abundant number, since it is smaller than the sum of its proper divisors (58719746).

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

52161550 is a wasteful number, since it uses less digits than its factorization.

52161550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149052 (or 149047 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 52161550 is about 7222.2953415102. The cubic root of 52161550 is about 373.6372463313.

Adding to 52161550 its reverse (5516125), we get a palindrome (57677675).

The spelling of 52161550 in words is "fifty-two million, one hundred sixty-one thousand, five hundred fifty".