221400053 has 8 divisors (see below), whose sum is σ = 253186560. Its totient is φ = 189653040.

The previous prime is 221400043. The next prime is 221400059. The reversal of 221400053 is 350004122.

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 221400053 - 2¹⁶ = 221334517 is a prime.

It is a super-4 number, since 4×221400053⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221400059) 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, 3323 + ... + 21303.

It is an arithmetic number, because the mean of its divisors is an integer number (31648320).

Almost surely, 2^221400053 is an apocalyptic number.

It is an amenable number.

221400053 is a deficient number, since it is larger than the sum of its proper divisors (31786507).

221400053 is a wasteful number, since it uses less digits than its factorization.

221400053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19747.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 221400053 is about 14879.5179021365. The cubic root of 221400053 is about 604.9589508383.

Adding to 221400053 its reverse (350004122), we get a palindrome (571404175).

The spelling of 221400053 in words is "two hundred twenty-one million, four hundred thousand, fifty-three".