53206140 has 48 divisors (see below), whose sum is σ = 160439328. Its totient is φ = 13096704.

The previous prime is 53206133. The next prime is 53206157. The reversal of 53206140 is 4160235.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33327 + ... + 34886.

It is an arithmetic number, because the mean of its divisors is an integer number (3342486).

Almost surely, 2^53206140 is an apocalyptic number.

It is an amenable number.

53206140 is an abundant number, since it is smaller than the sum of its proper divisors (107233188).

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

53206140 is a wasteful number, since it uses less digits than its factorization.

53206140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68238 (or 68236 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 53206140 is about 7294.2539029019. The cubic root of 53206140 is about 376.1149395851.

Adding to 53206140 its reverse (4160235), we get a palindrome (57366375).

The spelling of 53206140 in words is "fifty-three million, two hundred six thousand, one hundred forty".