1225031213 has 12 divisors (see below), whose sum is σ = 1500039360. Its totient is φ = 994761432.

The previous prime is 1225031209. The next prime is 1225031243. The reversal of 1225031213 is 3121305221.

It is not a de Polignac number, because 1225031213 - 2² = 1225031209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225031243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 656981 + ... + 658842.

It is an arithmetic number, because the mean of its divisors is an integer number (125003280).

Almost surely, 2^1225031213 is an apocalyptic number.

It is an amenable number.

1225031213 is a deficient number, since it is larger than the sum of its proper divisors (275008147).

1225031213 is a wasteful number, since it uses less digits than its factorization.

1225031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315856 (or 1315849 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1225031213 is about 35000.4458971597. The cubic root of 1225031213 is about 1069.9965682482.

Adding to 1225031213 its reverse (3121305221), we get a palindrome (4346336434).

The spelling of 1225031213 in words is "one billion, two hundred twenty-five million, thirty-one thousand, two hundred thirteen".