1225231563516 has 24 divisors (see below), whose sum is σ = 3009340682880. Its totient is φ = 386915230512.

The previous prime is 1225231563503. The next prime is 1225231563539. The reversal of 1225231563516 is 6153651325221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2686911096 + ... + 2686911551.

It is an arithmetic number, because the mean of its divisors is an integer number (125389195120).

Almost surely, 2^{1225231563516} is an apocalyptic number.

It is an amenable number.

1225231563516 is an abundant number, since it is smaller than the sum of its proper divisors (1784109119364).

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

1225231563516 is a wasteful number, since it uses less digits than its factorization.

1225231563516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373822673 (or 5373822671 counting only the distinct ones).

The product of its digits is 324000, while the sum is 42.

Adding to 1225231563516 its reverse (6153651325221), we get a palindrome (7378882888737).

The spelling of 1225231563516 in words is "one trillion, two hundred twenty-five billion, two hundred thirty-one million, five hundred sixty-three thousand, five hundred sixteen".