52170521 has 8 divisors (see below), whose sum is σ = 56400960. Its totient is φ = 47971152.

The previous prime is 52170511. The next prime is 52170533. The reversal of 52170521 is 12507125.

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 a de Polignac number, because none of the positive numbers 2^k-52170521 is a prime.

It is a super-2 number, since 2×52170521² = 5443526522822882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52170511) 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, 4211 + ... + 11048.

It is an arithmetic number, because the mean of its divisors is an integer number (7050120).

Almost surely, 2^52170521 is an apocalyptic number.

It is an amenable number.

52170521 is a deficient number, since it is larger than the sum of its proper divisors (4230439).

52170521 is a wasteful number, since it uses less digits than its factorization.

52170521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15535.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 52170521 is about 7222.9163777521. The cubic root of 52170521 is about 373.6586650941.

Adding to 52170521 its reverse (12507125), we get a palindrome (64677646).

The spelling of 52170521 in words is "fifty-two million, one hundred seventy thousand, five hundred twenty-one".