221146413 has 8 divisors (see below), whose sum is σ = 295508928. Its totient is φ = 147107424.

The previous prime is 221146379. The next prime is 221146417. The reversal of 221146413 is 314641122.

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

It is not a de Polignac number, because 221146413 - 2¹⁶ = 221080877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221146417) 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, 79281 + ... + 82022.

It is an arithmetic number, because the mean of its divisors is an integer number (36938616).

Almost surely, 2^221146413 is an apocalyptic number.

It is an amenable number.

221146413 is a deficient number, since it is larger than the sum of its proper divisors (74362515).

221146413 is a wasteful number, since it uses less digits than its factorization.

221146413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161763.

The product of its digits is 1152, while the sum is 24.

The square root of 221146413 is about 14870.9923340711. The cubic root of 221146413 is about 604.7278451711.

Adding to 221146413 its reverse (314641122), we get a palindrome (535787535).

The spelling of 221146413 in words is "two hundred twenty-one million, one hundred forty-six thousand, four hundred thirteen".