52717021 has 8 divisors (see below), whose sum is σ = 61717824. Its totient is φ = 44083680.

The previous prime is 52717013. The next prime is 52717043. The reversal of 52717021 is 12071725.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52717021 - 2³ = 52717013 is a prime.

It is a super-2 number, since 2×52717021² = 5558168606228882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52717061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91555 + ... + 92128.

It is an arithmetic number, because the mean of its divisors is an integer number (7714728).

Almost surely, 2^52717021 is an apocalyptic number.

It is an amenable number.

52717021 is a deficient number, since it is larger than the sum of its proper divisors (9000803).

52717021 is a wasteful number, since it uses less digits than its factorization.

52717021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183731.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 52717021 is about 7260.6488002106. The cubic root of 52717021 is about 374.9588600794.

Adding to 52717021 its reverse (12071725), we get a palindrome (64788746).

The spelling of 52717021 in words is "fifty-two million, seven hundred seventeen thousand, twenty-one".