52181778 has 16 divisors (see below), whose sum is σ = 113851296. Its totient is φ = 15812640.

The previous prime is 52181761. The next prime is 52181813. The reversal of 52181778 is 87718125.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395251 + ... + 395382.

It is an arithmetic number, because the mean of its divisors is an integer number (7115706).

Almost surely, 2^52181778 is an apocalyptic number.

52181778 is an abundant number, since it is smaller than the sum of its proper divisors (61669518).

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

52181778 is a wasteful number, since it uses less digits than its factorization.

52181778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790649.

The product of its digits is 31360, while the sum is 39.

The square root of 52181778 is about 7223.6955915930. The cubic root of 52181778 is about 373.6855383360.

It can be divided in two parts, 5218 and 1778, that added together give a palindrome (6996).

The spelling of 52181778 in words is "fifty-two million, one hundred eighty-one thousand, seven hundred seventy-eight".