51021150 has 96 divisors (see below), whose sum is σ = 134857440. Its totient is φ = 12741120.

The previous prime is 51021149. The next prime is 51021161. The reversal of 51021150 is 5112015.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160792 + ... + 161108.

It is an arithmetic number, because the mean of its divisors is an integer number (1404765).

Almost surely, 2^51021150 is an apocalyptic number.

51021150 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 51021150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67428720).

51021150 is an abundant number, since it is smaller than the sum of its proper divisors (83836290).

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

51021150 is a wasteful number, since it uses less digits than its factorization.

51021150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 51021150 is about 7142.9090712398. The cubic root of 51021150 is about 370.8942334298.

Adding to 51021150 its reverse (5112015), we get a palindrome (56133165).

The spelling of 51021150 in words is "fifty-one million, twenty-one thousand, one hundred fifty".