52197581 has 4 divisors (see below), whose sum is σ = 52390464. Its totient is φ = 52004700.

The previous prime is 52197577. The next prime is 52197601. The reversal of 52197581 is 18579125.

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 52197581 - 2² = 52197577 is a prime.

It is a super-2 number, since 2×52197581² = 5449174924503122, 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 (52197181) 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, 96035 + ... + 96576.

It is an arithmetic number, because the mean of its divisors is an integer number (13097616).

Almost surely, 2^52197581 is an apocalyptic number.

It is an amenable number.

52197581 is a deficient number, since it is larger than the sum of its proper divisors (192883).

52197581 is a wasteful number, since it uses less digits than its factorization.

52197581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192882.

The product of its digits is 25200, while the sum is 38.

The square root of 52197581 is about 7224.7893394894. The cubic root of 52197581 is about 373.7232574834.

The spelling of 52197581 in words is "fifty-two million, one hundred ninety-seven thousand, five hundred eighty-one".