550138401 has 24 divisors (see below), whose sum is σ = 802106240. Its totient is φ = 363333600.

The previous prime is 550138399. The next prime is 550138409. The reversal of 550138401 is 104831055.

It is not a de Polignac number, because 550138401 - 2¹ = 550138399 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (550138409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 514095 + ... + 515163.

Almost surely, 2^550138401 is an apocalyptic number.

It is an amenable number.

550138401 is a deficient number, since it is larger than the sum of its proper divisors (251967839).

550138401 is a wasteful number, since it uses less digits than its factorization.

550138401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 550138401 is about 23455.0293327465. The cubic root of 550138401 is about 819.3899890085.

Adding to 550138401 its reverse (104831055), we get a palindrome (654969456).

The spelling of 550138401 in words is "five hundred fifty million, one hundred thirty-eight thousand, four hundred one".