51282270 has 96 divisors (see below), whose sum is σ = 146476512. Its totient is φ = 12370176.

The previous prime is 51282241. The next prime is 51282271. The reversal of 51282270 is 7228215.

51282270 is a `hidden beast` number, since 512 + 82 + 2 + 70 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51282271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61597 + ... + 62423.

It is an arithmetic number, because the mean of its divisors is an integer number (1525797).

Almost surely, 2^51282270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51282270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73238256).

51282270 is an abundant number, since it is smaller than the sum of its proper divisors (95194242).

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

51282270 is a wasteful number, since it uses less digits than its factorization.

51282270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51282270 is about 7161.1640115277. The cubic root of 51282270 is about 371.5258875042.

The spelling of 51282270 in words is "fifty-one million, two hundred eighty-two thousand, two hundred seventy".