1225351536 has 20 divisors (see below), whose sum is σ = 3165491592. Its totient is φ = 408450496.

The previous prime is 1225351489. The next prime is 1225351537. The reversal of 1225351536 is 6351535221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1225351497 and 1225351506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225351537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12764031 + ... + 12764126.

Almost surely, 2^1225351536 is an apocalyptic number.

1225351536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1225351536 is an abundant number, since it is smaller than the sum of its proper divisors (1940140056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225351536 is a wasteful number, since it uses less digits than its factorization.

1225351536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25528168 (or 25528162 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 1225351536 is about 35005.0215826244. The cubic root of 1225351536 is about 1070.0898215568.

Adding to 1225351536 its reverse (6351535221), we get a palindrome (7576886757).

The spelling of 1225351536 in words is "one billion, two hundred twenty-five million, three hundred fifty-one thousand, five hundred thirty-six".