221312030 has 16 divisors (see below), whose sum is σ = 403162704. Its totient is φ = 87457920.

The previous prime is 221312027. The next prime is 221312033. The reversal of 221312030 is 30213122.

It is a happy number.

221312030 is digitally balanced in base 2 and base 3, because in such bases 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 (221312027) and next prime (221312033).

It is a junction number, because it is equal to n+sod(n) for n = 221311996 and 221312014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221312033) 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, 132491 + ... + 134150.

It is an arithmetic number, because the mean of its divisors is an integer number (25197669).

Almost surely, 2^221312030 is an apocalyptic number.

221312030 is a deficient number, since it is larger than the sum of its proper divisors (181850674).

221312030 is a wasteful number, since it uses less digits than its factorization.

221312030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266731.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221312030 is about 14876.5597501573. The cubic root of 221312030 is about 604.8787681410.

Adding to 221312030 its reverse (30213122), we get a palindrome (251525152).

The spelling of 221312030 in words is "two hundred twenty-one million, three hundred twelve thousand, thirty".