220731442 has 8 divisors (see below), whose sum is σ = 332831232. Its totient is φ = 109787700.

The previous prime is 220731419. The next prime is 220731479. The reversal of 220731442 is 244137022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288534 + ... + 289297.

It is an arithmetic number, because the mean of its divisors is an integer number (41603904).

Almost surely, 2^220731442 is an apocalyptic number.

220731442 is a deficient number, since it is larger than the sum of its proper divisors (112099790).

220731442 is a wasteful number, since it uses less digits than its factorization.

220731442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578024.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 220731442 is about 14857.0334185530. The cubic root of 220731442 is about 604.3493604062.

Adding to 220731442 its reverse (244137022), we get a palindrome (464868464).

The spelling of 220731442 in words is "two hundred twenty million, seven hundred thirty-one thousand, four hundred forty-two".