52181388 has 96 divisors (see below), whose sum is σ = 161387520. Its totient is φ = 14256000.

The previous prime is 52181383. The next prime is 52181399. The reversal of 52181388 is 88318125.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (52181383) 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, 15888 + ... + 18888.

It is an arithmetic number, because the mean of its divisors is an integer number (1681120).

Almost surely, 2^52181388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52181388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80693760).

52181388 is an abundant number, since it is smaller than the sum of its proper divisors (109206132).

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

52181388 is a wasteful number, since it uses less digits than its factorization.

52181388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044 (or 3036 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 52181388 is about 7223.6685970496. The cubic root of 52181388 is about 373.6846073742.

The spelling of 52181388 in words is "fifty-two million, one hundred eighty-one thousand, three hundred eighty-eight".