52021881 has 6 divisors (see below), whose sum is σ = 75142730. Its totient is φ = 34681248.

The previous prime is 52021877. The next prime is 52021897. The reversal of 52021881 is 18812025.

It can be written as a sum of positive squares in only one way, i.e., 33177600 + 18844281 = 5760^2 + 4341^2 .

It is not a de Polignac number, because 52021881 - 2² = 52021877 is a prime.

It is a super-2 number, since 2×52021881² = 5412552205556322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52021831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2890096 + ... + 2890113.

Almost surely, 2^52021881 is an apocalyptic number.

It is an amenable number.

52021881 is a deficient number, since it is larger than the sum of its proper divisors (23120849).

52021881 is a wasteful number, since it uses less digits than its factorization.

52021881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780215 (or 5780212 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 52021881 is about 7212.6195657334. The cubic root of 52021881 is about 373.3034615945.

The spelling of 52021881 in words is "fifty-two million, twenty-one thousand, eight hundred eighty-one".