1216044525 has 24 divisors (see below), whose sum is σ = 2023860544. Its totient is φ = 644256000.

The previous prime is 1216044509. The next prime is 1216044539. The reversal of 1216044525 is 5254406121.

It is not a de Polignac number, because 1216044525 - 2⁴ = 1216044509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1216044492 and 1216044501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42364 + ... + 65013.

Almost surely, 2^1216044525 is an apocalyptic number.

1216044525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1216044525 is a deficient number, since it is larger than the sum of its proper divisors (807816019).

1216044525 is a wasteful number, since it uses less digits than its factorization.

1216044525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107541 (or 107536 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1216044525 is about 34871.8299634533. The cubic root of 1216044525 is about 1067.3736868060.

The spelling of 1216044525 in words is "one billion, two hundred sixteen million, forty-four thousand, five hundred twenty-five".