52071921 has 12 divisors (see below), whose sum is σ = 82052880. Its totient is φ = 31558680.

The previous prime is 52071893. The next prime is 52071941. The reversal of 52071921 is 12917025.

It is not a de Polignac number, because 52071921 - 2⁵ = 52071889 is a prime.

It is a super-2 number, since 2×52071921² = 5422969913260482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52071941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262891 + ... + 263088.

It is an arithmetic number, because the mean of its divisors is an integer number (6837740).

Almost surely, 2^52071921 is an apocalyptic number.

It is an amenable number.

52071921 is a deficient number, since it is larger than the sum of its proper divisors (29980959).

52071921 is a wasteful number, since it uses less digits than its factorization.

52071921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525996 (or 525993 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 52071921 is about 7216.0876519067. The cubic root of 52071921 is about 373.4231171354.

Adding to 52071921 its reverse (12917025), we get a palindrome (64988946).

The spelling of 52071921 in words is "fifty-two million, seventy-one thousand, nine hundred twenty-one".