224451820 has 24 divisors (see below), whose sum is σ = 480244464. Its totient is φ = 88086336.

The previous prime is 224451817. The next prime is 224451839. The reversal of 224451820 is 28154422.

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, 104814 + ... + 106933.

It is an arithmetic number, because the mean of its divisors is an integer number (20010186).

Almost surely, 2^224451820 is an apocalyptic number.

224451820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224451820 is an abundant number, since it is smaller than the sum of its proper divisors (255792644).

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

224451820 is a wasteful number, since it uses less digits than its factorization.

224451820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211809 (or 211807 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 224451820 is about 14981.7161900765. The cubic root of 224451820 is about 607.7258509827.

The spelling of 224451820 in words is "two hundred twenty-four million, four hundred fifty-one thousand, eight hundred twenty".