1551201215155 has 8 divisors (see below), whose sum is σ = 1867065150384. Its totient is φ = 1237211844000.

The previous prime is 1551201215089. The next prime is 1551201215171. The reversal of 1551201215155 is 5515121021551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1551201215155 - 2²⁷ = 1551066997427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551201215155.

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, 468639196 + ... + 468642505.

It is an arithmetic number, because the mean of its divisors is an integer number (233383143798).

Almost surely, 2^{1551201215155} is an apocalyptic number.

1551201215155 is a deficient number, since it is larger than the sum of its proper divisors (315863935229).

1551201215155 is an equidigital number, since it uses as much as digits as its factorization.

1551201215155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937282037.

The product of its (nonzero) digits is 12500, while the sum is 34.

The spelling of 1551201215155 in words is "one trillion, five hundred fifty-one billion, two hundred one million, two hundred fifteen thousand, one hundred fifty-five".