221148070 has 96 divisors (see below), whose sum is σ = 499522464. Its totient is φ = 69780480.

The previous prime is 221148047. The next prime is 221148071. The reversal of 221148070 is 70841122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221148071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 266997 + ... + 267823.

It is an arithmetic number, because the mean of its divisors is an integer number (5203359).

Almost surely, 2^221148070 is an apocalyptic number.

221148070 is an abundant number, since it is smaller than the sum of its proper divisors (278374394).

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

221148070 is a wasteful number, since it uses less digits than its factorization.

221148070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 221148070 is about 14871.0480464559. The cubic root of 221148070 is about 604.7293555303.

Adding to 221148070 its reverse (70841122), we get a palindrome (291989192).

The spelling of 221148070 in words is "two hundred twenty-one million, one hundred forty-eight thousand, seventy".