51132272 has 20 divisors (see below), whose sum is σ = 99200496. Its totient is φ = 25532160.

The previous prime is 51132271. The next prime is 51132293. The reversal of 51132272 is 27223115.

It is a happy number.

It is a super-2 number, since 2×51132272² = 5229018479763968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132271) 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, 13997 + ... + 17267.

Almost surely, 2^51132272 is an apocalyptic number.

It is an amenable number.

51132272 is a deficient number, since it is larger than the sum of its proper divisors (48068224).

51132272 is a wasteful number, since it uses less digits than its factorization.

51132272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256 (or 4250 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 51132272 is about 7150.6833239908. The cubic root of 51132272 is about 371.1633023942.

Adding to 51132272 its reverse (27223115), we get a palindrome (78355387).

The spelling of 51132272 in words is "fifty-one million, one hundred thirty-two thousand, two hundred seventy-two".