221400030 has 32 divisors (see below), whose sum is σ = 532531584. Its totient is φ = 58909856.

The previous prime is 221400029. The next prime is 221400031. The reversal of 221400030 is 30004122.

221400030 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221400029) and next prime (221400031).

It is a junction number, because it is equal to n+sod(n) for n = 221399979 and 221400015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221400031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6109 + ... + 21911.

It is an arithmetic number, because the mean of its divisors is an integer number (16641612).

Almost surely, 2^221400030 is an apocalyptic number.

221400030 is an abundant number, since it is smaller than the sum of its proper divisors (311131554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221400030 is a wasteful number, since it uses less digits than its factorization.

221400030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16280.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 221400030 is about 14879.5171292620. The cubic root of 221400030 is about 604.9589298897.

Adding to 221400030 its reverse (30004122), we get a palindrome (251404152).

The spelling of 221400030 in words is "two hundred twenty-one million, four hundred thousand, thirty".