550001131 has 2 divisors, whose sum is σ = 550001132. Its totient is φ = 550001130.

The previous prime is 550001129. The next prime is 550001143. The reversal of 550001131 is 131100055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550001131 - 2¹ = 550001129 is a prime.

It is a super-2 number, since 2×550001131² = 605002488202558322, which contains 22 as substring.

Together with 550001129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (550001831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275000565 + 275000566.

It is an arithmetic number, because the mean of its divisors is an integer number (275000566).

Almost surely, 2^550001131 is an apocalyptic number.

550001131 is a deficient number, since it is larger than the sum of its proper divisors (1).

550001131 is an equidigital number, since it uses as much as digits as its factorization.

550001131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 550001131 is about 23452.1029121058. The cubic root of 550001131 is about 819.3218322077.

Adding to 550001131 its reverse (131100055), we get a palindrome (681101186).

The spelling of 550001131 in words is "five hundred fifty million, one thousand, one hundred thirty-one".