51212513530 has 8 divisors (see below), whose sum is σ = 92182524372. Its totient is φ = 20485005408.

The previous prime is 51212513503. The next prime is 51212513533. The reversal of 51212513530 is 3531521215.

It can be written as a sum of positive squares in 2 ways, for example, as 49774056201 + 1438457329 = 223101^2 + 37927^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51212513533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2560625667 + ... + 2560625686.

Almost surely, 2^51212513530 is an apocalyptic number.

51212513530 is a deficient number, since it is larger than the sum of its proper divisors (40970010842).

51212513530 is a wasteful number, since it uses less digits than its factorization.

51212513530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121251360.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 51212513530 in words is "fifty-one billion, two hundred twelve million, five hundred thirteen thousand, five hundred thirty".