51921752 has 8 divisors (see below), whose sum is σ = 97353300. Its totient is φ = 25960872.

The previous prime is 51921743. The next prime is 51921773. The reversal of 51921752 is 25712915.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245102 + ... + 3245117.

Almost surely, 2^51921752 is an apocalyptic number.

It is an amenable number.

51921752 is a deficient number, since it is larger than the sum of its proper divisors (45431548).

51921752 is a wasteful number, since it uses less digits than its factorization.

51921752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490225 (or 6490221 counting only the distinct ones).

The product of its digits is 6300, while the sum is 32.

The square root of 51921752 is about 7205.6749857317. The cubic root of 51921752 is about 373.0638027646.

The spelling of 51921752 in words is "fifty-one million, nine hundred twenty-one thousand, seven hundred fifty-two".