51018900 has 36 divisors (see below), whose sum is σ = 147615552. Its totient is φ = 13604960.

The previous prime is 51018889. The next prime is 51018907. The reversal of 51018900 is 981015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51018907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84732 + ... + 85331.

It is an arithmetic number, because the mean of its divisors is an integer number (4100432).

Almost surely, 2^51018900 is an apocalyptic number.

51018900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51018900 is an abundant number, since it is smaller than the sum of its proper divisors (96596652).

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

51018900 is a wasteful number, since it uses less digits than its factorization.

51018900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170080 (or 170073 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 51018900 is about 7142.7515706484. The cubic root of 51018900 is about 370.8887812837. Note that the first 3 decimals are identical.

Adding to 51018900 its reverse (981015), we get a palindrome (51999915).

The spelling of 51018900 in words is "fifty-one million, eighteen thousand, nine hundred".