220143402 has 24 divisors (see below), whose sum is σ = 488071584. Its totient is φ = 71674344.

The previous prime is 220143401. The next prime is 220143403. The reversal of 220143402 is 204341022.

220143402 is a `hidden beast` number, since 220 + 1 + 43 + 402 = 666.

It is an interprime number because it is at equal distance from previous prime (220143401) and next prime (220143403).

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

It is not an unprimeable number, because it can be changed into a prime (220143401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141438 + ... + 142985.

It is an arithmetic number, because the mean of its divisors is an integer number (20336316).

Almost surely, 2^220143402 is an apocalyptic number.

220143402 is an abundant number, since it is smaller than the sum of its proper divisors (267928182).

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

220143402 is a wasteful number, since it uses less digits than its factorization.

220143402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284474 (or 284471 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 220143402 is about 14837.2302671354. The cubic root of 220143402 is about 603.8122104537.

Adding to 220143402 its reverse (204341022), we get a palindrome (424484424).

The spelling of 220143402 in words is "two hundred twenty million, one hundred forty-three thousand, four hundred two".