1311225225 has 24 divisors (see below), whose sum is σ = 2183506080. Its totient is φ = 694283520.

The previous prime is 1311225217. The next prime is 1311225233. The reversal of 1311225225 is 5225221131.

It is an interprime number because it is at equal distance from previous prime (1311225217) and next prime (1311225233).

It is not a de Polignac number, because 1311225225 - 2³ = 1311225217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311225195 and 1311225204.

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, 52464 + ... + 73313.

It is an arithmetic number, because the mean of its divisors is an integer number (90979420).

Almost surely, 2^1311225225 is an apocalyptic number.

1311225225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311225225 is a deficient number, since it is larger than the sum of its proper divisors (872280855).

1311225225 is a wasteful number, since it uses less digits than its factorization.

1311225225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125929 (or 125924 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 1311225225 is about 36210.8440249603. The cubic root of 1311225225 is about 1094.5252002123.

Adding to 1311225225 its reverse (5225221131), we get a palindrome (6536446356).

The spelling of 1311225225 in words is "one billion, three hundred eleven million, two hundred twenty-five thousand, two hundred twenty-five".