51133553420 has 48 divisors (see below), whose sum is σ = 111697185600. Its totient is φ = 19638984960.

The previous prime is 51133553413. The next prime is 51133553437. The reversal of 51133553420 is 2435533115.

It is a super-2 number, since 2×51133553420² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 138560 + ... + 348519.

It is an arithmetic number, because the mean of its divisors is an integer number (2327024700).

Almost surely, 2^51133553420 is an apocalyptic number.

It is an amenable number.

51133553420 is an abundant number, since it is smaller than the sum of its proper divisors (60563632180).

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

51133553420 is a wasteful number, since it uses less digits than its factorization.

51133553420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487298 (or 487296 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 51133553420 in words is "fifty-one billion, one hundred thirty-three million, five hundred fifty-three thousand, four hundred twenty".