52123140 has 36 divisors (see below), whose sum is σ = 158107404. Its totient is φ = 13899456.

The previous prime is 52123133. The next prime is 52123153. The reversal of 52123140 is 4132125.

52123140 is a `hidden beast` number, since 521 + 2 + 3 + 140 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5419584 + 46703556 = 2328^2 + 6834^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 144607 + ... + 144966.

Almost surely, 2^52123140 is an apocalyptic number.

It is an amenable number.

52123140 is an abundant number, since it is smaller than the sum of its proper divisors (105984264).

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

52123140 is a wasteful number, since it uses less digits than its factorization.

52123140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289588 (or 289583 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 52123140 is about 7219.6357248825. The cubic root of 52123140 is about 373.5455125369.

Adding to 52123140 its reverse (4132125), we get a palindrome (56255265).

The spelling of 52123140 in words is "fifty-two million, one hundred twenty-three thousand, one hundred forty".