221427475 has 12 divisors (see below), whose sum is σ = 276109560. Its totient is φ = 176148800.

The previous prime is 221427473. The next prime is 221427523. The reversal of 221427475 is 574724122.

It is not a de Polignac number, because 221427475 - 2¹ = 221427473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221427475.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221427473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20266 + ... + 29215.

It is an arithmetic number, because the mean of its divisors is an integer number (23009130).

Almost surely, 2^221427475 is an apocalyptic number.

221427475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221427475 is a deficient number, since it is larger than the sum of its proper divisors (54682085).

221427475 is a wasteful number, since it uses less digits than its factorization.

221427475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49670 (or 49665 counting only the distinct ones).

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

The square root of 221427475 is about 14880.4393416324. The cubic root of 221427475 is about 604.9839259896.

The spelling of 221427475 in words is "two hundred twenty-one million, four hundred twenty-seven thousand, four hundred seventy-five".