51404216 has 8 divisors (see below), whose sum is σ = 96382920. Its totient is φ = 25702104.

The previous prime is 51404189. The next prime is 51404219. The reversal of 51404216 is 61240415.

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

It is a junction number, because it is equal to n+sod(n) for n = 51404191 and 51404200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51404219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212756 + ... + 3212771.

It is an arithmetic number, because the mean of its divisors is an integer number (12047865).

Almost surely, 2^51404216 is an apocalyptic number.

It is an amenable number.

51404216 is a deficient number, since it is larger than the sum of its proper divisors (44978704).

51404216 is a wasteful number, since it uses less digits than its factorization.

51404216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6425533 (or 6425529 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 51404216 is about 7169.6733537868. The cubic root of 51404216 is about 371.8201427543.

The spelling of 51404216 in words is "fifty-one million, four hundred four thousand, two hundred sixteen".