220401252 has 36 divisors (see below), whose sum is σ = 557642176. Its totient is φ = 73398960.

The previous prime is 220401241. The next prime is 220401317. The reversal of 220401252 is 252104022.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49977 + ... + 54207.

Almost surely, 2^220401252 is an apocalyptic number.

It is an amenable number.

220401252 is an abundant number, since it is smaller than the sum of its proper divisors (337240924).

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

220401252 is a wasteful number, since it uses less digits than its factorization.

220401252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688 (or 5683 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 220401252 is about 14845.9170144522. The cubic root of 220401252 is about 604.0478632596.

Adding to 220401252 its reverse (252104022), we get a palindrome (472505274).

The spelling of 220401252 in words is "two hundred twenty million, four hundred one thousand, two hundred fifty-two".