221472460 has 48 divisors (see below), whose sum is σ = 518192640. Its totient is φ = 78818240.

The previous prime is 221472443. The next prime is 221472467. The reversal of 221472460 is 64274122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221472467) 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, 370 + ... + 21049.

It is an arithmetic number, because the mean of its divisors is an integer number (10795680).

Almost surely, 2^221472460 is an apocalyptic number.

221472460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221472460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259096320).

221472460 is an abundant number, since it is smaller than the sum of its proper divisors (296720180).

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

221472460 is a wasteful number, since it uses less digits than its factorization.

221472460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21486 (or 21484 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 221472460 is about 14881.9508129815. The cubic root of 221472460 is about 605.0248925395.

The spelling of 221472460 in words is "two hundred twenty-one million, four hundred seventy-two thousand, four hundred sixty".