52451440 has 20 divisors (see below), whose sum is σ = 121949784. Its totient is φ = 20980544.

The previous prime is 52451437. The next prime is 52451453. The reversal of 52451440 is 4415425.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327742 + ... + 327901.

Almost surely, 2^52451440 is an apocalyptic number.

It is an amenable number.

52451440 is an abundant number, since it is smaller than the sum of its proper divisors (69498344).

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

52451440 is a wasteful number, since it uses less digits than its factorization.

52451440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655656 (or 655650 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 52451440 is about 7242.3366395108. The cubic root of 52451440 is about 374.3281362424.

Adding to 52451440 its reverse (4415425), we get a palindrome (56866865).

The spelling of 52451440 in words is "fifty-two million, four hundred fifty-one thousand, four hundred forty".