52781318 has 4 divisors (see below), whose sum is σ = 79171980. Its totient is φ = 26390658.

The previous prime is 52781317. The next prime is 52781321. The reversal of 52781318 is 81318725.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52781317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13195328 + ... + 13195331.

It is an arithmetic number, because the mean of its divisors is an integer number (19792995).

Almost surely, 2^52781318 is an apocalyptic number.

52781318 is a deficient number, since it is larger than the sum of its proper divisors (26390662).

52781318 is a wasteful number, since it uses less digits than its factorization.

52781318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26390661.

The product of its digits is 13440, while the sum is 35.

The square root of 52781318 is about 7265.0752232857. The cubic root of 52781318 is about 375.1112392952. Note that the first 3 decimals are identical.

The spelling of 52781318 in words is "fifty-two million, seven hundred eighty-one thousand, three hundred eighteen".