1545250221312 has 144 divisors (see below), whose sum is σ = 4701319631232. Its totient is φ = 441388892160.

The previous prime is 1545250221269. The next prime is 1545250221373. The reversal of 1545250221312 is 2131220525451.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22636512 + ... + 22704672.

Almost surely, 2^{1545250221312} is an apocalyptic number.

1545250221312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1545250221312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2350659815616).

1545250221312 is an abundant number, since it is smaller than the sum of its proper divisors (3156069409920).

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

1545250221312 is an equidigital number, since it uses as much as digits as its factorization.

1545250221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72404 (or 72390 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 1545250221312 its reverse (2131220525451), we get a palindrome (3676470746763).

The spelling of 1545250221312 in words is "one trillion, five hundred forty-five billion, two hundred fifty million, two hundred twenty-one thousand, three hundred twelve".