51025010240 has 56 divisors (see below), whose sum is σ = 122618098680. Its totient is φ = 20222742528.

The previous prime is 51025010237. The next prime is 51025010243. The reversal of 51025010240 is 4201052015.

51025010240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51025010237) and next prime (51025010243).

It can be written as a sum of positive squares in 4 ways, for example, as 17559430144 + 33465580096 = 132512^2 + 182936^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (51025010243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696557 + ... + 766316.

It is an arithmetic number, because the mean of its divisors is an integer number (2189608905).

Almost surely, 2^51025010240 is an apocalyptic number.

It is an amenable number.

51025010240 is an abundant number, since it is smaller than the sum of its proper divisors (71593088440).

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

51025010240 is a wasteful number, since it uses less digits than its factorization.

51025010240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462999 (or 1462989 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 51025010240 its reverse (4201052015), we get a palindrome (55226062255).

The spelling of 51025010240 in words is "fifty-one billion, twenty-five million, ten thousand, two hundred forty".