550145531 has 6 divisors (see below), whose sum is σ = 595719900. Its totient is φ = 507826488.

The previous prime is 550145527. The next prime is 550145543. The reversal of 550145531 is 135541055.

It is not a de Polignac number, because 550145531 - 2² = 550145527 is a prime.

It is a super-2 number, since 2×550145531² = 605320210558543922, 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 = 550145494 and 550145503.

It is not an unprimeable number, because it can be changed into a prime (550145731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1627481 + ... + 1627818.

It is an arithmetic number, because the mean of its divisors is an integer number (99286650).

Almost surely, 2^550145531 is an apocalyptic number.

550145531 is a deficient number, since it is larger than the sum of its proper divisors (45574369).

550145531 is a wasteful number, since it uses less digits than its factorization.

550145531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255325 (or 3255312 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 550145531 is about 23455.1813252424. The cubic root of 550145531 is about 819.3935288604.

Adding to 550145531 its reverse (135541055), we get a palindrome (685686586).

The spelling of 550145531 in words is "five hundred fifty million, one hundred forty-five thousand, five hundred thirty-one".