551140042 has 4 divisors (see below), whose sum is σ = 826710066. Its totient is φ = 275570020.

The previous prime is 551140039. The next prime is 551140043. The reversal of 551140042 is 240041155.

551140042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 380289001 + 170851041 = 19501^2 + 13071^2 .

It is a junction number, because it is equal to n+sod(n) for n = 551139995 and 551140022.

It is not an unprimeable number, because it can be changed into a prime (551140043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137785009 + ... + 137785012.

Almost surely, 2^551140042 is an apocalyptic number.

551140042 is a deficient number, since it is larger than the sum of its proper divisors (275570024).

551140042 is a wasteful number, since it uses less digits than its factorization.

551140042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275570023.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 551140042 is about 23476.3719939858. The cubic root of 551140042 is about 819.8869772839.

Adding to 551140042 its reverse (240041155), we get a palindrome (791181197).

The spelling of 551140042 in words is "five hundred fifty-one million, one hundred forty thousand, forty-two".