501400550 has 72 divisors (see below), whose sum is σ = 1132446864. Its totient is φ = 161763840.

The previous prime is 501400547. The next prime is 501400561. The reversal of 501400550 is 55004105.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 98672 + ... + 103628.

Almost surely, 2^501400550 is an apocalyptic number.

501400550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

501400550 is an abundant number, since it is smaller than the sum of its proper divisors (631046314).

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

501400550 is a wasteful number, since it uses less digits than its factorization.

501400550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010 (or 4988 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 501400550 is about 22391.9751250308. The cubic root of 501400550 is about 794.4409132953.

Adding to 501400550 its reverse (55004105), we get a palindrome (556404655).

The spelling of 501400550 in words is "five hundred one million, four hundred thousand, five hundred fifty".