52253440 has 36 divisors (see below), whose sum is σ = 125166384. Its totient is φ = 20900864.

The previous prime is 52253437. The next prime is 52253441. The reversal of 52253440 is 4435225.

It is not an unprimeable number, because it can be changed into a prime (52253441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19132 + ... + 21691.

It is an arithmetic number, because the mean of its divisors is an integer number (3476844).

Almost surely, 2^52253440 is an apocalyptic number.

It is an amenable number.

52253440 is an abundant number, since it is smaller than the sum of its proper divisors (72912944).

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

52253440 is an equidigital number, since it uses as much as digits as its factorization.

52253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40844 (or 40830 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 52253440 is about 7228.6540932597. The cubic root of 52253440 is about 373.8565226957.

Adding to 52253440 its reverse (4435225), we get a palindrome (56688665).

The spelling of 52253440 in words is "fifty-two million, two hundred fifty-three thousand, four hundred forty".