51033280 has 56 divisors (see below), whose sum is σ = 122803920. Its totient is φ = 20198400.

The previous prime is 51033247. The next prime is 51033313. The reversal of 51033280 is 8233015.

It is an interprime number because it is at equal distance from previous prime (51033247) and next prime (51033313).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31531 + ... + 33109.

Almost surely, 2^51033280 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 51033280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61401960).

51033280 is an abundant number, since it is smaller than the sum of its proper divisors (71770640).

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

51033280 is a wasteful number, since it uses less digits than its factorization.

51033280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 51033280 is about 7143.7581146061. The cubic root of 51033280 is about 370.9236237942.

Adding to 51033280 its reverse (8233015), we get a palindrome (59266295).

The spelling of 51033280 in words is "fifty-one million, thirty-three thousand, two hundred eighty".