142220224 has 56 divisors (see below), whose sum is σ = 298460160. Its totient is φ = 67102464.

The previous prime is 142220209. The next prime is 142220231. The reversal of 142220224 is 422022241.

It is a super-2 number, since 2×142220224² = 40453184229220352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115677 + ... + 116899.

Almost surely, 2^142220224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142220224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149230080).

142220224 is an abundant number, since it is smaller than the sum of its proper divisors (156239936).

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

142220224 is a wasteful number, since it uses less digits than its factorization.

142220224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 142220224 is about 11925.6121016910. The cubic root of 142220224 is about 521.9799075271.

Adding to 142220224 its reverse (422022241), we get a palindrome (564242465).

The spelling of 142220224 in words is "one hundred forty-two million, two hundred twenty thousand, two hundred twenty-four".