51002125240 has 32 divisors (see below), whose sum is σ = 125187035760. Its totient is φ = 18546227200.

The previous prime is 51002125219. The next prime is 51002125249. The reversal of 51002125240 is 4252120015.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51002125249) 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, 57956521 + ... + 57957400.

Almost surely, 2^51002125240 is an apocalyptic number.

It is an amenable number.

51002125240 is an abundant number, since it is smaller than the sum of its proper divisors (74184910520).

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

51002125240 is a wasteful number, since it uses less digits than its factorization.

51002125240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115913943 (or 115913939 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 51002125240 its reverse (4252120015), we get a palindrome (55254245255).

The spelling of 51002125240 in words is "fifty-one billion, two million, one hundred twenty-five thousand, two hundred forty".