51040172 has 12 divisors (see below), whose sum is σ = 89973240. Its totient is φ = 25333536.

The previous prime is 51040169. The next prime is 51040181. The reversal of 51040172 is 27104015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46022 + ... + 47117.

It is an arithmetic number, because the mean of its divisors is an integer number (7497770).

Almost surely, 2^51040172 is an apocalyptic number.

It is an amenable number.

51040172 is a deficient number, since it is larger than the sum of its proper divisors (38933068).

51040172 is a wasteful number, since it uses less digits than its factorization.

51040172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93280 (or 93278 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 51040172 is about 7144.2404774755. The cubic root of 51040172 is about 370.9403206800.

Adding to 51040172 its reverse (27104015), we get a palindrome (78144187).

The spelling of 51040172 in words is "fifty-one million, forty thousand, one hundred seventy-two".