551212223200 has 72 divisors (see below), whose sum is σ = 1345901356800. Its totient is φ = 220443187200.

The previous prime is 551212223197. The next prime is 551212223227. The reversal of 551212223200 is 2322212155.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4354401 + ... + 4479199.

It is an arithmetic number, because the mean of its divisors is an integer number (18693074400).

Almost surely, 2^551212223200 is an apocalyptic number.

551212223200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

551212223200 is an abundant number, since it is smaller than the sum of its proper divisors (794689133600).

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

551212223200 is a wasteful number, since it uses less digits than its factorization.

551212223200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130340 (or 130327 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 551212223200 its reverse (2322212155), we get a palindrome (553534435355).

The spelling of 551212223200 in words is "five hundred fifty-one billion, two hundred twelve million, two hundred twenty-three thousand, two hundred".