1225324351540 has 24 divisors (see below), whose sum is σ = 2579472551880. Its totient is φ = 488931376128.

The previous prime is 1225324351523. The next prime is 1225324351549. The reversal of 1225324351540 is 451534235221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 308809158436 + 916515193104 = 555706^2 + 957348^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1225324351540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225324351549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74889397 + ... + 74905756.

It is an arithmetic number, because the mean of its divisors is an integer number (107478022995).

Almost surely, 2^{1225324351540} is an apocalyptic number.

1225324351540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225324351540 is an abundant number, since it is smaller than the sum of its proper divisors (1354148200340).

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

1225324351540 is a wasteful number, since it uses less digits than its factorization.

1225324351540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149795571 (or 149795569 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 1225324351540 its reverse (451534235221), we get a palindrome (1676858586761).

The spelling of 1225324351540 in words is "one trillion, two hundred twenty-five billion, three hundred twenty-four million, three hundred fifty-one thousand, five hundred forty".