52971517 has 4 divisors (see below), whose sum is σ = 53046940. Its totient is φ = 52896096.

The previous prime is 52971511. The next prime is 52971547. The reversal of 52971517 is 71517925.

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 31125241 + 21846276 = 5579^2 + 4674^2 .

It is a cyclic number.

It is not a de Polignac number, because 52971517 - 2³ = 52971509 is a prime.

It is a super-2 number, since 2×52971517² = 5611963226562578, 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 (52971511) 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, 36648 + ... + 38065.

It is an arithmetic number, because the mean of its divisors is an integer number (13261735).

Almost surely, 2^52971517 is an apocalyptic number.

It is an amenable number.

52971517 is a deficient number, since it is larger than the sum of its proper divisors (75423).

52971517 is an equidigital number, since it uses as much as digits as its factorization.

52971517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75422.

The product of its digits is 22050, while the sum is 37.

The square root of 52971517 is about 7278.1534059128. The cubic root of 52971517 is about 375.5612738756.

The spelling of 52971517 in words is "fifty-two million, nine hundred seventy-one thousand, five hundred seventeen".