51250740 has 48 divisors (see below), whose sum is σ = 144912768. Its totient is φ = 13532544.

The previous prime is 51250729. The next prime is 51250777. The reversal of 51250740 is 4705215.

It is a self number, because there is not a number n which added to its sum of digits gives 51250740.

It is a congruent number.

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, 2034 + ... + 10326.

It is an arithmetic number, because the mean of its divisors is an integer number (3019016).

Almost surely, 2^51250740 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 51250740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72456384).

51250740 is an abundant number, since it is smaller than the sum of its proper divisors (93662028).

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

51250740 is a wasteful number, since it uses less digits than its factorization.

51250740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408 (or 8406 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 51250740 is about 7158.9622152935. The cubic root of 51250740 is about 371.4497298457.

Adding to 51250740 its reverse (4705215), we get a palindrome (55955955).

The spelling of 51250740 in words is "fifty-one million, two hundred fifty thousand, seven hundred forty".