51784072 has 8 divisors (see below), whose sum is σ = 97095150. Its totient is φ = 25892032.

The previous prime is 51784039. The next prime is 51784087. The reversal of 51784072 is 27048715.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 5080516 = 6834^2 + 2254^2 .

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

It is a super-2 number, since 2×51784072² = 5363180225802368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3236497 + ... + 3236512.

Almost surely, 2^51784072 is an apocalyptic number.

It is an amenable number.

51784072 is a deficient number, since it is larger than the sum of its proper divisors (45311078).

51784072 is a wasteful number, since it uses less digits than its factorization.

51784072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6473015 (or 6473011 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 51784072 is about 7196.1150630045. The cubic root of 51784072 is about 372.7337619551.

The spelling of 51784072 in words is "fifty-one million, seven hundred eighty-four thousand, seventy-two".