50131800 has 72 divisors (see below), whose sum is σ = 168365340. Its totient is φ = 13368000.

The previous prime is 50131777. The next prime is 50131811. The reversal of 50131800 is 813105.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 12126 + ... + 15725.

Almost surely, 2^50131800 is an apocalyptic number.

50131800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

50131800 is an abundant number, since it is smaller than the sum of its proper divisors (118233540).

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

50131800 is a wasteful number, since it uses less digits than its factorization.

50131800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27873 (or 27861 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 50131800 is about 7080.3813456621. The cubic root of 50131800 is about 368.7265694200.

Adding to 50131800 its reverse (813105), we get a palindrome (50944905).

The spelling of 50131800 in words is "fifty million, one hundred thirty-one thousand, eight hundred".