51501272 has 16 divisors (see below), whose sum is σ = 98811240. Its totient is φ = 25151616.

The previous prime is 51501271. The next prime is 51501293. The reversal of 51501272 is 27210515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51501271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74513 + ... + 75200.

Almost surely, 2^51501272 is an apocalyptic number.

It is an amenable number.

51501272 is a deficient number, since it is larger than the sum of its proper divisors (47309968).

51501272 is a wasteful number, since it uses less digits than its factorization.

51501272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149762 (or 149758 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 51501272 is about 7176.4386710959. The cubic root of 51501272 is about 372.0540061107.

Adding to 51501272 its reverse (27210515), we get a palindrome (78711787).

The spelling of 51501272 in words is "fifty-one million, five hundred one thousand, two hundred seventy-two".