52197281 has 4 divisors (see below), whose sum is σ = 54466752. Its totient is φ = 49927812.

The previous prime is 52197253. The next prime is 52197311. The reversal of 52197281 is 18279125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52197281 - 2⁶ = 52197217 is a prime.

It is a super-2 number, since 2×52197281² = 5449112287585922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52197251) 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, 1134701 + ... + 1134746.

It is an arithmetic number, because the mean of its divisors is an integer number (13616688).

Almost surely, 2^52197281 is an apocalyptic number.

It is an amenable number.

52197281 is a deficient number, since it is larger than the sum of its proper divisors (2269471).

52197281 is a wasteful number, since it uses less digits than its factorization.

52197281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269470.

The product of its digits is 10080, while the sum is 35.

The square root of 52197281 is about 7224.7685776086. The cubic root of 52197281 is about 373.7225415039.

The spelling of 52197281 in words is "fifty-two million, one hundred ninety-seven thousand, two hundred eighty-one".