221143953 has 8 divisors (see below), whose sum is σ = 295316928. Its totient is φ = 147200144.

The previous prime is 221143943. The next prime is 221143961. The reversal of 221143953 is 359341122.

221143953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221143953 - 2⁵ = 221143921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221143953.

It is not an unprimeable number, because it can be changed into a prime (221143903) 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, 55026 + ... + 58907.

It is an arithmetic number, because the mean of its divisors is an integer number (36914616).

Almost surely, 2^221143953 is an apocalyptic number.

It is an amenable number.

221143953 is a deficient number, since it is larger than the sum of its proper divisors (74172975).

221143953 is a wasteful number, since it uses less digits than its factorization.

221143953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114583.

The product of its digits is 6480, while the sum is 30.

The square root of 221143953 is about 14870.9096224811. The cubic root of 221143953 is about 604.7256028618.

It can be divided in two parts, 2211 and 43953, that added together give a palindrome (46164).

The spelling of 221143953 in words is "two hundred twenty-one million, one hundred forty-three thousand, nine hundred fifty-three".