51120315502020 has 36 divisors (see below), whose sum is σ = 155064957023340. Its totient is φ = 13632084133824.

The previous prime is 51120315501991. The next prime is 51120315502073. The reversal of 51120315502020 is 2020551302115.

51120315502020 is a `hidden beast` number, since 5 + 1 + 120 + 3 + 15 + 502 + 0 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12165041816964 + 38955273685056 = 3487842^2 + 6241416^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×51120315502020² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142000876215 + ... + 142000876574.

It is an arithmetic number, because the mean of its divisors is an integer number (4307359917315).

Almost surely, 2^{51120315502020} is an apocalyptic number.

It is an amenable number.

51120315502020 is an abundant number, since it is smaller than the sum of its proper divisors (103944641521320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51120315502020 is a wasteful number, since it uses less digits than its factorization.

51120315502020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284001752804 (or 284001752799 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 51120315502020 its reverse (2020551302115), we get a palindrome (53140866804135).

The spelling of 51120315502020 in words is "fifty-one trillion, one hundred twenty billion, three hundred fifteen million, five hundred two thousand, twenty".