551667444 has 48 divisors (see below), whose sum is σ = 1347526656. Its totient is φ = 175442400.

The previous prime is 551667437. The next prime is 551667449. The reversal of 551667444 is 444766155.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 551667396 and 551667405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551667449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15969 + ... + 36855.

It is an arithmetic number, because the mean of its divisors is an integer number (28073472).

Almost surely, 2^551667444 is an apocalyptic number.

It is an amenable number.

551667444 is an abundant number, since it is smaller than the sum of its proper divisors (795859212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551667444 is a wasteful number, since it uses less digits than its factorization.

551667444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20996 (or 20994 counting only the distinct ones).

The product of its digits is 403200, while the sum is 42.

The square root of 551667444 is about 23487.6019210136. The cubic root of 551667444 is about 820.1484185047.

The spelling of 551667444 in words is "five hundred fifty-one million, six hundred sixty-seven thousand, four hundred forty-four".