51633450 has 240 divisors, whose sum is σ = 167444640. Its totient is φ = 11664000.

The previous prime is 51633443. The next prime is 51633451. The reversal of 51633450 is 5433615.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51633451) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 846420 + ... + 846480.

It is an arithmetic number, because the mean of its divisors is an integer number (697686).

Almost surely, 2^51633450 is an apocalyptic number.

51633450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51633450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83722320).

51633450 is an abundant number, since it is smaller than the sum of its proper divisors (115811190).

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

51633450 is a wasteful number, since it uses less digits than its factorization.

51633450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 51633450 is about 7185.6419337454. The cubic root of 51633450 is about 372.3720263664.

The spelling of 51633450 in words is "fifty-one million, six hundred thirty-three thousand, four hundred fifty".