51010221513 has 8 divisors (see below), whose sum is σ = 68017135648. Its totient is φ = 34005060864.

The previous prime is 51010221499. The next prime is 51010221547. The reversal of 51010221513 is 31512201015.

51010221513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51010221513 - 2⁴ = 51010221497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51010221513.

It is not an unprimeable number, because it can be changed into a prime (51010221013) 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, 368920 + ... + 487977.

It is an arithmetic number, because the mean of its divisors is an integer number (8502141956).

Almost surely, 2^51010221513 is an apocalyptic number.

It is an amenable number.

51010221513 is a deficient number, since it is larger than the sum of its proper divisors (17006914135).

51010221513 is a wasteful number, since it uses less digits than its factorization.

51010221513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876743.

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 51010221513 its reverse (31512201015), we get a palindrome (82522422528).

The spelling of 51010221513 in words is "fifty-one billion, ten million, two hundred twenty-one thousand, five hundred thirteen".