51521553530 has 16 divisors (see below), whose sum is σ = 94310641440. Its totient is φ = 20259322512.

The previous prime is 51521553529. The next prime is 51521553533. The reversal of 51521553530 is 3535512515.

It is not an unprimeable number, because it can be changed into a prime (51521553533) 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, 43661744 + ... + 43662923.

It is an arithmetic number, because the mean of its divisors is an integer number (5894415090).

Almost surely, 2^51521553530 is an apocalyptic number.

51521553530 is a deficient number, since it is larger than the sum of its proper divisors (42789087910).

51521553530 is a wasteful number, since it uses less digits than its factorization.

51521553530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87324733.

The product of its (nonzero) digits is 56250, while the sum is 35.

The spelling of 51521553530 in words is "fifty-one billion, five hundred twenty-one million, five hundred fifty-three thousand, five hundred thirty".