1220554214540 has 24 divisors (see below), whose sum is σ = 2566285887312. Its totient is φ = 487627012160.

The previous prime is 1220554214513. The next prime is 1220554214567. The reversal of 1220554214540 is 454124550221.

It is an interprime number because it is at equal distance from previous prime (1220554214513) and next prime (1220554214567).

It is a self number, because there is not a number n which added to its sum of digits gives 1220554214540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37150274 + ... + 37183113.

It is an arithmetic number, because the mean of its divisors is an integer number (106928578638).

Almost surely, 2^{1220554214540} is an apocalyptic number.

1220554214540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220554214540 is an abundant number, since it is smaller than the sum of its proper divisors (1345731672772).

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

1220554214540 is a wasteful number, since it uses less digits than its factorization.

1220554214540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74334217 (or 74334215 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 1220554214540 its reverse (454124550221), we get a palindrome (1674678764761).

The spelling of 1220554214540 in words is "one trillion, two hundred twenty billion, five hundred fifty-four million, two hundred fourteen thousand, five hundred forty".