522222251 has 4 divisors (see below), whose sum is σ = 522375000. Its totient is φ = 522069504.

The previous prime is 522222241. The next prime is 522222287. The reversal of 522222251 is 152222225.

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

It is a cyclic number.

It is not a de Polignac number, because 522222251 - 2²² = 518027947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522222241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71126 + ... + 78123.

It is an arithmetic number, because the mean of its divisors is an integer number (130593750).

Almost surely, 2^522222251 is an apocalyptic number.

522222251 is a deficient number, since it is larger than the sum of its proper divisors (152749).

522222251 is a wasteful number, since it uses less digits than its factorization.

522222251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152748.

The product of its digits is 1600, while the sum is 23.

The square root of 522222251 is about 22852.1826309874. The cubic root of 522222251 is about 805.2890445124.

Adding to 522222251 its reverse (152222225), we get a palindrome (674444476).

The spelling of 522222251 in words is "five hundred twenty-two million, two hundred twenty-two thousand, two hundred fifty-one".