221012470 has 32 divisors (see below), whose sum is σ = 466947648. Its totient is φ = 73726848.

The previous prime is 221012453. The next prime is 221012489. The reversal of 221012470 is 74210122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40077 + ... + 45256.

It is an arithmetic number, because the mean of its divisors is an integer number (14592114).

Almost surely, 2^221012470 is an apocalyptic number.

221012470 is an abundant number, since it is smaller than the sum of its proper divisors (245935178).

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

221012470 is a wasteful number, since it uses less digits than its factorization.

221012470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85384.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 221012470 is about 14866.4881528894. The cubic root of 221012470 is about 604.6057308680.

Adding to 221012470 its reverse (74210122), we get a palindrome (295222592).

The spelling of 221012470 in words is "two hundred twenty-one million, twelve thousand, four hundred seventy".