51190172 has 24 divisors (see below), whose sum is σ = 98095872. Its totient is φ = 23180400.

The previous prime is 51190141. The next prime is 51190177. The reversal of 51190172 is 27109115.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51190177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10397 + ... + 14507.

It is an arithmetic number, because the mean of its divisors is an integer number (4087328).

Almost surely, 2^51190172 is an apocalyptic number.

It is an amenable number.

51190172 is a deficient number, since it is larger than the sum of its proper divisors (46905700).

51190172 is a wasteful number, since it uses less digits than its factorization.

51190172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 51190172 is about 7154.7307426625. The cubic root of 51190172 is about 371.3033460358.

Adding to 51190172 its reverse (27109115), we get a palindrome (78299287).

The spelling of 51190172 in words is "fifty-one million, one hundred ninety thousand, one hundred seventy-two".