51416388 has 18 divisors (see below), whose sum is σ = 129969294. Its totient is φ = 17138784.

The previous prime is 51416353. The next prime is 51416423. The reversal of 51416388 is 88361415.

51416388 is a `hidden beast` number, since 5 + 14 + 1 + 638 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (51416353) and next prime (51416423).

It can be written as a sum of positive squares in only one way, i.e., 49112064 + 2304324 = 7008^2 + 1518^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1428233 = 51416388 / (5 + 1 + 4 + 1 + 6 + 3 + 8 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 714081 + ... + 714152.

Almost surely, 2^51416388 is an apocalyptic number.

It is an amenable number.

51416388 is an abundant number, since it is smaller than the sum of its proper divisors (78552906).

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

51416388 is a wasteful number, since it uses less digits than its factorization.

51416388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428243 (or 1428238 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 51416388 is about 7170.5221567191. The cubic root of 51416388 is about 371.8494881917.

The spelling of 51416388 in words is "fifty-one million, four hundred sixteen thousand, three hundred eighty-eight".