523220122 has 4 divisors (see below), whose sum is σ = 784830186. Its totient is φ = 261610060.

The previous prime is 523220107. The next prime is 523220143. The reversal of 523220122 is 221022325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 344436481 + 178783641 = 18559^2 + 13371^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 523220122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130805029 + ... + 130805032.

Almost surely, 2^523220122 is an apocalyptic number.

523220122 is a deficient number, since it is larger than the sum of its proper divisors (261610064).

523220122 is a wasteful number, since it uses less digits than its factorization.

523220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261610063.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 523220122 is about 22874.0053772836. The cubic root of 523220122 is about 805.8016380792.

Adding to 523220122 its reverse (221022325), we get a palindrome (744242447).

The spelling of 523220122 in words is "five hundred twenty-three million, two hundred twenty thousand, one hundred twenty-two".