1225611016 has 32 divisors (see below), whose sum is σ = 2662295040. Its totient is φ = 518064768.

The previous prime is 1225611011. The next prime is 1225611041. The reversal of 1225611016 is 6101165221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1225611011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145816 + ... + 153991.

It is an arithmetic number, because the mean of its divisors is an integer number (83196720).

Almost surely, 2^1225611016 is an apocalyptic number.

It is an amenable number.

1225611016 is an abundant number, since it is smaller than the sum of its proper divisors (1436684024).

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

1225611016 is a wasteful number, since it uses less digits than its factorization.

1225611016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299893 (or 299889 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1225611016 is about 35008.7277118149. The cubic root of 1225611016 is about 1070.1653501709.

Adding to 1225611016 its reverse (6101165221), we get a palindrome (7326776237).

The spelling of 1225611016 in words is "one billion, two hundred twenty-five million, six hundred eleven thousand, sixteen".