550400131 has 4 divisors (see below), whose sum is σ = 550644552. Its totient is φ = 550155712.

The previous prime is 550400117. The next prime is 550400153. The reversal of 550400131 is 131004055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 550400131 - 2⁷ = 550400003 is a prime.

It is a super-2 number, since 2×550400131² = 605880608409634322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550400099 and 550400108.

It is not an unprimeable number, because it can be changed into a prime (550400111) 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, 118801 + ... + 123346.

It is an arithmetic number, because the mean of its divisors is an integer number (137661138).

Almost surely, 2^550400131 is an apocalyptic number.

550400131 is a deficient number, since it is larger than the sum of its proper divisors (244421).

550400131 is a wasteful number, since it uses less digits than its factorization.

550400131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244420.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 550400131 is about 23460.6080696984. The cubic root of 550400131 is about 819.5199108249.

Adding to 550400131 its reverse (131004055), we get a palindrome (681404186).

The spelling of 550400131 in words is "five hundred fifty million, four hundred thousand, one hundred thirty-one".