52191940 has 12 divisors (see below), whose sum is σ = 109603116. Its totient is φ = 20876768.

The previous prime is 52191913. The next prime is 52191947. The reversal of 52191940 is 4919125.

It can be written as a sum of positive squares in 2 ways, for example, as 20921476 + 31270464 = 4574^2 + 5592^2 .

It is not an unprimeable number, because it can be changed into a prime (52191947) 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, 1304779 + ... + 1304818.

It is an arithmetic number, because the mean of its divisors is an integer number (9133593).

Almost surely, 2^52191940 is an apocalyptic number.

It is an amenable number.

52191940 is an abundant number, since it is smaller than the sum of its proper divisors (57411176).

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

52191940 is a wasteful number, since it uses less digits than its factorization.

52191940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609606 (or 2609604 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 52191940 is about 7224.3989369359. The cubic root of 52191940 is about 373.7097942232.

The spelling of 52191940 in words is "fifty-two million, one hundred ninety-one thousand, nine hundred forty".