53197144 has 144 divisors (see below), whose sum is σ = 138940920. Its totient is φ = 18869760.

The previous prime is 53197141. The next prime is 53197153. The reversal of 53197144 is 44179135.

It is a super-2 number, since 2×53197144² = 5659872259513472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53197141) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 728692 + ... + 728764.

Almost surely, 2^53197144 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 53197144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69470460).

53197144 is an abundant number, since it is smaller than the sum of its proper divisors (85743776).

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

53197144 is a wasteful number, since it uses less digits than its factorization.

53197144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 106 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 53197144 is about 7293.6372270631. The cubic root of 53197144 is about 376.0937407742.

Subtracting from 53197144 its reverse (44179135), we obtain a square (9018009 = 3003²).

The spelling of 53197144 in words is "fifty-three million, one hundred ninety-seven thousand, one hundred forty-four".