551223456 has 48 divisors (see below), whose sum is σ = 1653672384. Its totient is φ = 157492224.

The previous prime is 551223403. The next prime is 551223469. The reversal of 551223456 is 654322155.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409465 + ... + 410808.

It is an arithmetic number, because the mean of its divisors is an integer number (34451508).

Almost surely, 2^551223456 is an apocalyptic number.

551223456 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

551223456 is an abundant number, since it is smaller than the sum of its proper divisors (1102448928).

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

551223456 is a wasteful number, since it uses less digits than its factorization.

551223456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820293 (or 820285 counting only the distinct ones).

The product of its digits is 36000, while the sum is 33.

The square root of 551223456 is about 23478.1484789580. The cubic root of 551223456 is about 819.9283379770.

The spelling of 551223456 in words is "five hundred fifty-one million, two hundred twenty-three thousand, four hundred fifty-six".