52242521 has 4 divisors (see below), whose sum is σ = 53354112. Its totient is φ = 51130932.

The previous prime is 52242481. The next prime is 52242539. The reversal of 52242521 is 12524225.

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 a de Polignac number, because none of the positive numbers 2^k-52242521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52212521) 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, 555725 + ... + 555818.

It is an arithmetic number, because the mean of its divisors is an integer number (13338528).

Almost surely, 2^52242521 is an apocalyptic number.

It is an amenable number.

52242521 is a deficient number, since it is larger than the sum of its proper divisors (1111591).

52242521 is a wasteful number, since it uses less digits than its factorization.

52242521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111590.

The product of its digits is 1600, while the sum is 23.

The square root of 52242521 is about 7227.8987956390. The cubic root of 52242521 is about 373.8304802397.

Adding to 52242521 its reverse (12524225), we get a palindrome (64766746).

The spelling of 52242521 in words is "fifty-two million, two hundred forty-two thousand, five hundred twenty-one".