1225030511565 has 288 divisors, whose sum is σ = 2711850575616. Its totient is φ = 508444231680.

The previous prime is 1225030511527. The next prime is 1225030511569. The reversal of 1225030511565 is 5651150305221.

1225030511565 is a `hidden beast` number, since 1 + 2 + 2 + 50 + 30 + 5 + 11 + 565 = 666.

It is not a de Polignac number, because 1225030511565 - 2¹³ = 1225030503373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225030511569) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 76926694 + ... + 76942616.

It is an arithmetic number, because the mean of its divisors is an integer number (9416147832).

Almost surely, 2^{1225030511565} is an apocalyptic number.

1225030511565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225030511565 is an abundant number, since it is smaller than the sum of its proper divisors (1486820064051).

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

1225030511565 is a wasteful number, since it uses less digits than its factorization.

1225030511565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16049 (or 16039 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

Adding to 1225030511565 its reverse (5651150305221), we get a palindrome (6876180816786).

The spelling of 1225030511565 in words is "one trillion, two hundred twenty-five billion, thirty million, five hundred eleven thousand, five hundred sixty-five".