550513431 has 24 divisors (see below), whose sum is σ = 906731280. Its totient is φ = 318848256.

The previous prime is 550513373. The next prime is 550513433. The reversal of 550513431 is 134315055.

550513431 is a `hidden beast` number, since 550 + 51 + 34 + 31 = 666.

It is not a de Polignac number, because 550513431 - 2¹⁰ = 550512407 is a prime.

It is a super-2 number, since 2×550513431² = 606130075422783522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 550513395 and 550513404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550513433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136401 + ... + 140378.

It is an arithmetic number, because the mean of its divisors is an integer number (37780470).

Almost surely, 2^550513431 is an apocalyptic number.

550513431 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

550513431 is a deficient number, since it is larger than the sum of its proper divisors (356217849).

550513431 is a wasteful number, since it uses less digits than its factorization.

550513431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276815 (or 276812 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 550513431 is about 23463.0226313661. The cubic root of 550513431 is about 819.5761397574.

Adding to 550513431 its reverse (134315055), we get a palindrome (684828486).

The spelling of 550513431 in words is "five hundred fifty million, five hundred thirteen thousand, four hundred thirty-one".