51677172 has 18 divisors (see below), whose sum is σ = 130628498. Its totient is φ = 17225712.

The previous prime is 51677141. The next prime is 51677177. The reversal of 51677172 is 27177615.

51677172 is a `hidden beast` number, since 516 + 7 + 71 + 72 = 666.

51677172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44675856 + 7001316 = 6684^2 + 2646^2 .

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

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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: 1435477 = 51677172 / (5 + 1 + 6 + 7 + 7 + 1 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51677177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 717703 + ... + 717774.

Almost surely, 2^51677172 is an apocalyptic number.

It is an amenable number.

51677172 is an abundant number, since it is smaller than the sum of its proper divisors (78951326).

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

51677172 is a wasteful number, since it uses less digits than its factorization.

51677172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435487 (or 1435482 counting only the distinct ones).

The product of its digits is 20580, while the sum is 36.

The square root of 51677172 is about 7188.6836068922. The cubic root of 51677172 is about 372.4771020262.

The spelling of 51677172 in words is "fifty-one million, six hundred seventy-seven thousand, one hundred seventy-two".