53500140 has 72 divisors (see below), whose sum is σ = 164284848. Its totient is φ = 14090880.

The previous prime is 53500129. The next prime is 53500163. The reversal of 53500140 is 4100535.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13150 + ... + 16730.

It is an arithmetic number, because the mean of its divisors is an integer number (2281734).

Almost surely, 2^53500140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53500140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82142424).

53500140 is an abundant number, since it is smaller than the sum of its proper divisors (110784708).

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

53500140 is a wasteful number, since it uses less digits than its factorization.

53500140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679 (or 3674 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 53500140 is about 7314.3789893606. The cubic root of 53500140 is about 376.8064308476.

Adding to 53500140 its reverse (4100535), we get a palindrome (57600675).

The spelling of 53500140 in words is "fifty-three million, five hundred thousand, one hundred forty".