51226280 has 64 divisors (see below), whose sum is σ = 138672000. Its totient is φ = 16637184.

The previous prime is 51226277. The next prime is 51226303. The reversal of 51226280 is 8262215.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (2166750).

Almost surely, 2^51226280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51226280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69336000).

51226280 is an abundant number, since it is smaller than the sum of its proper divisors (87445720).

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

51226280 is a wasteful number, since it uses less digits than its factorization.

51226280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9666 (or 9662 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 51226280 is about 7157.2536632426. The cubic root of 51226280 is about 371.3906275694.

Adding to 51226280 its reverse (8262215), we get a palindrome (59488495).

The spelling of 51226280 in words is "fifty-one million, two hundred twenty-six thousand, two hundred eighty".