52981820 has 12 divisors (see below), whose sum is σ = 111261864. Its totient is φ = 21192720.

The previous prime is 52981813. The next prime is 52981829. The reversal of 52981820 is 2818925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52981829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324526 + ... + 1324565.

It is an arithmetic number, because the mean of its divisors is an integer number (9271822).

Almost surely, 2^52981820 is an apocalyptic number.

It is an amenable number.

52981820 is an abundant number, since it is smaller than the sum of its proper divisors (58280044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52981820 is a wasteful number, since it uses less digits than its factorization.

52981820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649100 (or 2649098 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 52981820 is about 7278.8611746619. The cubic root of 52981820 is about 375.5856212808.

The spelling of 52981820 in words is "fifty-two million, nine hundred eighty-one thousand, eight hundred twenty".