224251220 has 24 divisors (see below), whose sum is σ = 472474464. Its totient is φ = 89405856.

The previous prime is 224251213. The next prime is 224251231. The reversal of 224251220 is 22152422.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 224251192 and 224251201.

It is a congruent number.

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, 12122 + ... + 24401.

It is an arithmetic number, because the mean of its divisors is an integer number (19686436).

Almost surely, 2^224251220 is an apocalyptic number.

224251220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224251220 is an abundant number, since it is smaller than the sum of its proper divisors (248223244).

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

224251220 is a wasteful number, since it uses less digits than its factorization.

224251220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36839 (or 36837 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 224251220 is about 14975.0198664309. The cubic root of 224251220 is about 607.5447488022.

The spelling of 224251220 in words is "two hundred twenty-four million, two hundred fifty-one thousand, two hundred twenty".