53122140 has 36 divisors (see below), whose sum is σ = 161137704. Its totient is φ = 14165856.

The previous prime is 53122133. The next prime is 53122141. The reversal of 53122140 is 4122135.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53122141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147382 + ... + 147741.

Almost surely, 2^53122140 is an apocalyptic number.

It is an amenable number.

53122140 is an abundant number, since it is smaller than the sum of its proper divisors (108015564).

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

53122140 is a wasteful number, since it uses less digits than its factorization.

53122140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295138 (or 295133 counting only the distinct ones).

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

The square root of 53122140 is about 7288.4936715346. The cubic root of 53122140 is about 375.9169029434.

Adding to 53122140 its reverse (4122135), we get a palindrome (57244275).

The spelling of 53122140 in words is "fifty-three million, one hundred twenty-two thousand, one hundred forty".