51011321700 has 72 divisors (see below), whose sum is σ = 148334603200. Its totient is φ = 13534646400.

The previous prime is 51011321687. The next prime is 51011321723. The reversal of 51011321700 is 712311015.

It is a happy 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 23 ways as a sum of consecutive naturals, for example, 367531 + ... + 486930.

Almost surely, 2^51011321700 is an apocalyptic number.

51011321700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51011321700 is an abundant number, since it is smaller than the sum of its proper divisors (97323281500).

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

51011321700 is a wasteful number, since it uses less digits than its factorization.

51011321700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854677 (or 854670 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 21.

Adding to 51011321700 its reverse (712311015), we get a palindrome (51723632715).

The spelling of 51011321700 in words is "fifty-one billion, eleven million, three hundred twenty-one thousand, seven hundred".