51123021336 has 24 divisors (see below), whose sum is σ = 138458182980. Its totient is φ = 17041007088.

The previous prime is 51123021293. The next prime is 51123021359. The reversal of 51123021336 is 63312032115.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×51123021336² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 355020910 + ... + 355021053.

Almost surely, 2^51123021336 is an apocalyptic number.

It is an amenable number.

51123021336 is an abundant number, since it is smaller than the sum of its proper divisors (87335161644).

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

51123021336 is a wasteful number, since it uses less digits than its factorization.

51123021336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710041975 (or 710041968 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The spelling of 51123021336 in words is "fifty-one billion, one hundred twenty-three million, twenty-one thousand, three hundred thirty-six".