551543042 has 4 divisors (see below), whose sum is σ = 827314566. Its totient is φ = 275771520.

The previous prime is 551543023. The next prime is 551543063. The reversal of 551543042 is 240345155.

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

It can be written as a sum of positive squares in only one way, i.e., 549011761 + 2531281 = 23431^2 + 1591^2 .

It is a super-3 number, since 3×551543042³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 551542996 and 551543014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137885759 + ... + 137885762.

Almost surely, 2^551543042 is an apocalyptic number.

551543042 is a deficient number, since it is larger than the sum of its proper divisors (275771524).

551543042 is a wasteful number, since it uses less digits than its factorization.

551543042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275771523.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 551543042 is about 23484.9535234797. The cubic root of 551543042 is about 820.0867655561.

Adding to 551543042 its reverse (240345155), we get a palindrome (791888197).

The spelling of 551543042 in words is "five hundred fifty-one million, five hundred forty-three thousand, forty-two".