1215551555141 has 24 divisors (see below), whose sum is σ = 1607340920640. Its totient is φ = 897331279680.

The previous prime is 1215551555111. The next prime is 1215551555161. The reversal of 1215551555141 is 1415551555121.

It is not a de Polignac number, because 1215551555141 - 2¹⁰ = 1215551554117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215551555111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37750376 + ... + 37782561.

It is an arithmetic number, because the mean of its divisors is an integer number (66972538360).

Almost surely, 2^{1215551555141} is an apocalyptic number.

1215551555141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1215551555141 is a deficient number, since it is larger than the sum of its proper divisors (391789365499).

1215551555141 is a wasteful number, since it uses less digits than its factorization.

1215551555141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75532985 (or 75532974 counting only the distinct ones).

The product of its digits is 125000, while the sum is 41.

The spelling of 1215551555141 in words is "one trillion, two hundred fifteen billion, five hundred fifty-one million, five hundred fifty-five thousand, one hundred forty-one".