51282172 has 12 divisors (see below), whose sum is σ = 89794656. Its totient is φ = 25626560.

The previous prime is 51282137. The next prime is 51282173. The reversal of 51282172 is 27128215.

It is a super-3 number, since 3×51282172³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 51282172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51282173) 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, 9972 + ... + 14212.

It is an arithmetic number, because the mean of its divisors is an integer number (7482888).

Almost surely, 2^51282172 is an apocalyptic number.

It is an amenable number.

51282172 is a deficient number, since it is larger than the sum of its proper divisors (38512484).

51282172 is a wasteful number, since it uses less digits than its factorization.

51282172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7268 (or 7266 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 51282172 is about 7161.1571690614. The cubic root of 51282172 is about 371.5256508430.

The spelling of 51282172 in words is "fifty-one million, two hundred eighty-two thousand, one hundred seventy-two".