51123172 has 12 divisors (see below), whose sum is σ = 92550780. Its totient is φ = 24680096.

The previous prime is 51123161. The next prime is 51123179. The reversal of 51123172 is 27132115.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28901376 + 22221796 = 5376^2 + 4714^2 .

It is a super-2 number, since 2×51123172² = 5227157430683168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51123179) by changing a digit.

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, 220243 + ... + 220474.

It is an arithmetic number, because the mean of its divisors is an integer number (7712565).

Almost surely, 2^51123172 is an apocalyptic number.

It is an amenable number.

51123172 is a deficient number, since it is larger than the sum of its proper divisors (41427608).

51123172 is a wasteful number, since it uses less digits than its factorization.

51123172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440750 (or 440748 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 51123172 is about 7150.0469928526. The cubic root of 51123172 is about 371.1412824688.

Adding to 51123172 its reverse (27132115), we get a palindrome (78255287).

The spelling of 51123172 in words is "fifty-one million, one hundred twenty-three thousand, one hundred seventy-two".