551000642 has 16 divisors (see below), whose sum is σ = 838848312. Its totient is φ = 271393920.

The previous prime is 551000629. The next prime is 551000647. The reversal of 551000642 is 246000155.

It can be written as a sum of positive squares in 4 ways, for example, as 428034721 + 122965921 = 20689^2 + 11089^2 .

It is not an unprimeable number, because it can be changed into a prime (551000647) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 153128 + ... + 156684.

Almost surely, 2^551000642 is an apocalyptic number.

551000642 is a deficient number, since it is larger than the sum of its proper divisors (287847670).

551000642 is a wasteful number, since it uses less digits than its factorization.

551000642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 551000642 is about 23473.4028636668. The cubic root of 551000642 is about 819.8178467101.

Adding to 551000642 its reverse (246000155), we get a palindrome (797000797).

The spelling of 551000642 in words is "five hundred fifty-one million, six hundred forty-two", and thus it is an aban number.