51122729900 has 54 divisors (see below), whose sum is σ = 121938302220. Its totient is φ = 18590079200.

The previous prime is 51122729893. The next prime is 51122729927. The reversal of 51122729900 is 992722115.

It is a super-2 number, since 2×51122729900² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2100410 + ... + 2124609.

Almost surely, 2^51122729900 is an apocalyptic number.

51122729900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51122729900 is an abundant number, since it is smaller than the sum of its proper divisors (70815572320).

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

51122729900 is a wasteful number, since it uses less digits than its factorization.

51122729900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4225055 (or 4225037 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 51122729900 in words is "fifty-one billion, one hundred twenty-two million, seven hundred twenty-nine thousand, nine hundred".