51172342 has 16 divisors (see below), whose sum is σ = 82827360. Its totient is φ = 23571072.

The previous prime is 51172333. The next prime is 51172349. The reversal of 51172342 is 24327115.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51172349) 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, 13759 + ... + 17077.

It is an arithmetic number, because the mean of its divisors is an integer number (5176710).

Almost surely, 2^51172342 is an apocalyptic number.

51172342 is a deficient number, since it is larger than the sum of its proper divisors (31655018).

51172342 is a wasteful number, since it uses less digits than its factorization.

51172342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927.

The product of its digits is 1680, while the sum is 25.

The square root of 51172342 is about 7153.4846054213. The cubic root of 51172342 is about 371.2602315916.

Adding to 51172342 its reverse (24327115), we get a palindrome (75499457).

The spelling of 51172342 in words is "fifty-one million, one hundred seventy-two thousand, three hundred forty-two".