220101225 has 48 divisors (see below), whose sum is σ = 385183680. Its totient is φ = 110592000.

The previous prime is 220101221. The next prime is 220101229. The reversal of 220101225 is 522101022.

It is an interprime number because it is at equal distance from previous prime (220101221) and next prime (220101229).

It is not a de Polignac number, because 220101225 - 2² = 220101221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (220101221) 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, 365925 + ... + 366525.

It is an arithmetic number, because the mean of its divisors is an integer number (8024660).

Almost surely, 2^220101225 is an apocalyptic number.

220101225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220101225 is a deficient number, since it is larger than the sum of its proper divisors (165082455).

220101225 is a wasteful number, since it uses less digits than its factorization.

220101225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 220101225 is about 14835.8088758247. The cubic root of 220101225 is about 603.7736467812.

Adding to 220101225 its reverse (522101022), we get a palindrome (742202247).

The spelling of 220101225 in words is "two hundred twenty million, one hundred one thousand, two hundred twenty-five".