1225531233547 has 2 divisors, whose sum is σ = 1225531233548. Its totient is φ = 1225531233546.

The previous prime is 1225531233517. The next prime is 1225531233551. The reversal of 1225531233547 is 7453321355221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225531233547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225531233517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612765616773 + 612765616774.

It is an arithmetic number, because the mean of its divisors is an integer number (612765616774).

Almost surely, 2^{1225531233547} is an apocalyptic number.

1225531233547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225531233547 is an equidigital number, since it uses as much as digits as its factorization.

1225531233547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 43.

Adding to 1225531233547 its reverse (7453321355221), we get a palindrome (8678852588768).

The spelling of 1225531233547 in words is "one trillion, two hundred twenty-five billion, five hundred thirty-one million, two hundred thirty-three thousand, five hundred forty-seven".