50181640 has 16 divisors (see below), whose sum is σ = 112908780. Its totient is φ = 20072640.

The previous prime is 50181623. The next prime is 50181643. The reversal of 50181640 is 4618105.

It can be written as a sum of positive squares in 2 ways, for example, as 45995524 + 4186116 = 6782^2 + 2046^2 .

It is not an unprimeable number, because it can be changed into a prime (50181643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627231 + ... + 627310.

Almost surely, 2^50181640 is an apocalyptic number.

It is an amenable number.

50181640 is an abundant number, since it is smaller than the sum of its proper divisors (62727140).

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

50181640 is a wasteful number, since it uses less digits than its factorization.

50181640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254552 (or 1254548 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 50181640 is about 7083.9000557602. The cubic root of 50181640 is about 368.8487223945.

Adding to 50181640 its reverse (4618105), we get a palindrome (54799745).

The spelling of 50181640 in words is "fifty million, one hundred eighty-one thousand, six hundred forty".