1224312445540 has 24 divisors (see below), whose sum is σ = 2571696986040. Its totient is φ = 489602911488.

The previous prime is 1224312445481. The next prime is 1224312445621. The reversal of 1224312445540 is 455442134221.

It can be written as a sum of positive squares in 4 ways, for example, as 507391234596 + 716921210944 = 712314^2 + 846712^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1224312445540.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7546905 + ... + 7707424.

It is an arithmetic number, because the mean of its divisors is an integer number (107154041085).

Almost surely, 2^{1224312445540} is an apocalyptic number.

1224312445540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224312445540 is an abundant number, since it is smaller than the sum of its proper divisors (1347384540500).

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

1224312445540 is a wasteful number, since it uses less digits than its factorization.

1224312445540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15258351 (or 15258349 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 1224312445540 its reverse (455442134221), we get a palindrome (1679754579761).

The spelling of 1224312445540 in words is "one trillion, two hundred twenty-four billion, three hundred twelve million, four hundred forty-five thousand, five hundred forty".