51889950 has 288 divisors, whose sum is σ = 182726400. Its totient is φ = 10575360.

The previous prime is 51889907. The next prime is 51889963. The reversal of 51889950 is 5998815.

51889950 is a `hidden beast` number, since 518 + 89 + 9 + 50 = 666.

It is a super-2 number, since 2×51889950² = 5385133822005000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 51889896 and 51889905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2731041 + ... + 2731059.

Almost surely, 2^51889950 is an apocalyptic number.

51889950 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 51889950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91363200).

51889950 is an abundant number, since it is smaller than the sum of its proper divisors (130836450).

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

51889950 is a wasteful number, since it uses less digits than its factorization.

51889950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 51889950 is about 7203.4679148310. The cubic root of 51889950 is about 372.9876201906.

The spelling of 51889950 in words is "fifty-one million, eight hundred eighty-nine thousand, nine hundred fifty".