52853981 has 4 divisors (see below), whose sum is σ = 52871964. Its totient is φ = 52836000.

The previous prime is 52853959. The next prime is 52853987. The reversal of 52853981 is 18935825.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6205081 + 46648900 = 2491^2 + 6830^2 .

It is a cyclic number.

It is not a de Polignac number, because 52853981 - 2¹⁴ = 52837597 is a prime.

It is a super-2 number, since 2×52853981² = 5587086615096722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52853987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3440 + ... + 10841.

It is an arithmetic number, because the mean of its divisors is an integer number (13217991).

Almost surely, 2^52853981 is an apocalyptic number.

It is an amenable number.

52853981 is a deficient number, since it is larger than the sum of its proper divisors (17983).

52853981 is a wasteful number, since it uses less digits than its factorization.

52853981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17982.

The product of its digits is 86400, while the sum is 41.

The square root of 52853981 is about 7270.0743462498. The cubic root of 52853981 is about 375.2832964463.

The spelling of 52853981 in words is "fifty-two million, eight hundred fifty-three thousand, nine hundred eighty-one".