1225531120365 has 32 divisors (see below), whose sum is σ = 2273449040640. Its totient is φ = 625198483008.

The previous prime is 1225531120343. The next prime is 1225531120367. The reversal of 1225531120365 is 5630211355221.

1225531120365 is a `hidden beast` number, since 1 + 2 + 255 + 31 + 12 + 0 + 365 = 666.

It is not a de Polignac number, because 1225531120365 - 2⁶ = 1225531120301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225531120367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197344902 + ... + 197351111.

It is an arithmetic number, because the mean of its divisors is an integer number (71045282520).

Almost surely, 2^{1225531120365} is an apocalyptic number.

1225531120365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225531120365 is a deficient number, since it is larger than the sum of its proper divisors (1047917920275).

1225531120365 is a wasteful number, since it uses less digits than its factorization.

1225531120365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394696050 (or 394696044 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 1225531120365 its reverse (5630211355221), we get a palindrome (6855742475586).

The spelling of 1225531120365 in words is "one trillion, two hundred twenty-five billion, five hundred thirty-one million, one hundred twenty thousand, three hundred sixty-five".