51270172 has 12 divisors (see below), whose sum is σ = 91911456. Its totient is φ = 25009760.

The previous prime is 51270157. The next prime is 51270199. The reversal of 51270172 is 27107215.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156148 + ... + 156475.

It is an arithmetic number, because the mean of its divisors is an integer number (7659288).

Almost surely, 2^51270172 is an apocalyptic number.

It is an amenable number.

51270172 is a deficient number, since it is larger than the sum of its proper divisors (40641284).

51270172 is a wasteful number, since it uses less digits than its factorization.

51270172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312668 (or 312666 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 51270172 is about 7160.3192666249. The cubic root of 51270172 is about 371.4966696498.

Adding to 51270172 its reverse (27107215), we get a palindrome (78377387).

The spelling of 51270172 in words is "fifty-one million, two hundred seventy thousand, one hundred seventy-two".