51457272 has 32 divisors (see below), whose sum is σ = 132794880. Its totient is φ = 16598880.

The previous prime is 51457271. The next prime is 51457277. The reversal of 51457272 is 27275415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51457271) 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, 33838 + ... + 35325.

It is an arithmetic number, because the mean of its divisors is an integer number (4149840).

Almost surely, 2^51457272 is an apocalyptic number.

It is an amenable number.

51457272 is an abundant number, since it is smaller than the sum of its proper divisors (81337608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51457272 is a wasteful number, since it uses less digits than its factorization.

51457272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69203 (or 69199 counting only the distinct ones).

The product of its digits is 19600, while the sum is 33.

The square root of 51457272 is about 7173.3724286419. The cubic root of 51457272 is about 371.9480214113.

The spelling of 51457272 in words is "fifty-one million, four hundred fifty-seven thousand, two hundred seventy-two".