1225312522 has 48 divisors (see below), whose sum is σ = 2167814880. Its totient is φ = 517884192.

The previous prime is 1225312457. The next prime is 1225312579. The reversal of 1225312522 is 2252135221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3991093 + ... + 3991399.

It is an arithmetic number, because the mean of its divisors is an integer number (45162810).

Almost surely, 2^1225312522 is an apocalyptic number.

1225312522 is a deficient number, since it is larger than the sum of its proper divisors (942502358).

1225312522 is a wasteful number, since it uses less digits than its factorization.

1225312522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 748 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 1225312522 is about 35004.4643152841. The cubic root of 1225312522 is about 1070.0784645636.

Adding to 1225312522 its reverse (2252135221), we get a palindrome (3477447743).

The spelling of 1225312522 in words is "one billion, two hundred twenty-five million, three hundred twelve thousand, five hundred twenty-two".