1005221032540 has 48 divisors (see below), whose sum is σ = 2124138691584. Its totient is φ = 399580193600.

The previous prime is 1005221032537. The next prime is 1005221032547. The reversal of 1005221032540 is 452301225001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005221032547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14029005 + ... + 14100475.

It is an arithmetic number, because the mean of its divisors is an integer number (44252889408).

Almost surely, 2^{1005221032540} is an apocalyptic number.

1005221032540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005221032540 is an abundant number, since it is smaller than the sum of its proper divisors (1118917659044).

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

1005221032540 is a wasteful number, since it uses less digits than its factorization.

1005221032540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75858 (or 75856 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 1005221032540 its reverse (452301225001), we get a palindrome (1457522257541).

The spelling of 1005221032540 in words is "one trillion, five billion, two hundred twenty-one million, thirty-two thousand, five hundred forty".