1225225522 has 4 divisors (see below), whose sum is σ = 1837838286. Its totient is φ = 612612760.

The previous prime is 1225225517. The next prime is 1225225559. The reversal of 1225225522 is 2255225221.

It is a happy number.

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., 1207493001 + 17732521 = 34749^2 + 4211^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306306379 + ... + 306306382.

Almost surely, 2^1225225522 is an apocalyptic number.

1225225522 is a deficient number, since it is larger than the sum of its proper divisors (612612764).

1225225522 is an equidigital number, since it uses as much as digits as its factorization.

1225225522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612612763.

The product of its digits is 8000, while the sum is 28.

The square root of 1225225522 is about 35003.2215945904. The cubic root of 1225225522 is about 1070.0531379556.

The spelling of 1225225522 in words is "one billion, two hundred twenty-five million, two hundred twenty-five thousand, five hundred twenty-two".