51520475330 has 16 divisors (see below), whose sum is σ = 93557537784. Its totient is φ = 20425816320.

The previous prime is 51520475329. The next prime is 51520475399. The reversal of 51520475330 is 3357402515.

It can be written as a sum of positive squares in 4 ways, for example, as 12185289769 + 39335185561 = 110387^2 + 198331^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22795541 + ... + 22797800.

Almost surely, 2^51520475330 is an apocalyptic number.

51520475330 is a deficient number, since it is larger than the sum of its proper divisors (42037062454).

51520475330 is a wasteful number, since it uses less digits than its factorization.

51520475330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45593461.

The product of its (nonzero) digits is 63000, while the sum is 35.

Adding to 51520475330 its reverse (3357402515), we get a palindrome (54877877845).

The spelling of 51520475330 in words is "fifty-one billion, five hundred twenty million, four hundred seventy-five thousand, three hundred thirty".