221136501 has 8 divisors (see below), whose sum is σ = 295020640. Its totient is φ = 147338352.

The previous prime is 221136479. The next prime is 221136523. The reversal of 221136501 is 105631122.

It is an interprime number because it is at equal distance from previous prime (221136479) and next prime (221136523).

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

It is not a de Polignac number, because 221136501 - 2⁵ = 221136469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221136581) 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, 15235 + ... + 25968.

It is an arithmetic number, because the mean of its divisors is an integer number (36877580).

Almost surely, 2^221136501 is an apocalyptic number.

It is an amenable number.

221136501 is a deficient number, since it is larger than the sum of its proper divisors (73884139).

221136501 is a wasteful number, since it uses less digits than its factorization.

221136501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42995.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 221136501 is about 14870.6590640765. The cubic root of 221136501 is about 604.7188102036.

Adding to 221136501 its reverse (105631122), we get a palindrome (326767623).

The spelling of 221136501 in words is "two hundred twenty-one million, one hundred thirty-six thousand, five hundred one".