50731218 has 32 divisors (see below), whose sum is σ = 115787520. Its totient is φ = 16452720.

The previous prime is 50731211. The next prime is 50731249. The reversal of 50731218 is 81213705.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 50731191 and 50731200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50731211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10698 + ... + 14693.

It is an arithmetic number, because the mean of its divisors is an integer number (3618360).

Almost surely, 2^50731218 is an apocalyptic number.

50731218 is an abundant number, since it is smaller than the sum of its proper divisors (65056302).

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

50731218 is a wasteful number, since it uses less digits than its factorization.

50731218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25439 (or 25433 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 50731218 is about 7122.5850644271. The cubic root of 50731218 is about 370.1903525037.

The spelling of 50731218 in words is "fifty million, seven hundred thirty-one thousand, two hundred eighteen".