51520125430 has 32 divisors (see below), whose sum is σ = 95746510080. Its totient is φ = 19939359360.

The previous prime is 51520125413. The next prime is 51520125443. The reversal of 51520125430 is 3452102515.

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, 1945116 + ... + 1971424.

It is an arithmetic number, because the mean of its divisors is an integer number (2992078440).

Almost surely, 2^51520125430 is an apocalyptic number.

51520125430 is a deficient number, since it is larger than the sum of its proper divisors (44226384650).

51520125430 is a wasteful number, since it uses less digits than its factorization.

51520125430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32664.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 51520125430 its reverse (3452102515), we get a palindrome (54972227945).

The spelling of 51520125430 in words is "fifty-one billion, five hundred twenty million, one hundred twenty-five thousand, four hundred thirty".