1545122221320 has 64 divisors (see below), whose sum is σ = 4640628464640. Its totient is φ = 411564876800.

The previous prime is 1545122221309. The next prime is 1545122221337. The reversal of 1545122221320 is 231222215451.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 7201896 + ... + 7413335.

It is an arithmetic number, because the mean of its divisors is an integer number (72509819760).

Almost surely, 2^{1545122221320} is an apocalyptic number.

1545122221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1545122221320 is an abundant number, since it is smaller than the sum of its proper divisors (3095506243320).

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

1545122221320 is a wasteful number, since it uses less digits than its factorization.

1545122221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14616126 (or 14616122 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1545122221320 its reverse (231222215451), we get a palindrome (1776344436771).

The spelling of 1545122221320 in words is "one trillion, five hundred forty-five billion, one hundred twenty-two million, two hundred twenty-one thousand, three hundred twenty".