221472457 has 8 divisors (see below), whose sum is σ = 222883200. Its totient is φ = 220066224.

The previous prime is 221472443. The next prime is 221472467. The reversal of 221472457 is 754274122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221472457 - 2¹¹ = 221470409 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 168798 + ... + 170104.

It is an arithmetic number, because the mean of its divisors is an integer number (27860400).

Almost surely, 2^221472457 is an apocalyptic number.

It is an amenable number.

221472457 is a deficient number, since it is larger than the sum of its proper divisors (1410743).

221472457 is a wasteful number, since it uses less digits than its factorization.

221472457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255.

The product of its digits is 31360, while the sum is 34.

The square root of 221472457 is about 14881.9507121882. The cubic root of 221472457 is about 605.0248898077.

The spelling of 221472457 in words is "two hundred twenty-one million, four hundred seventy-two thousand, four hundred fifty-seven".