2155145020311 has 16 divisors (see below), whose sum is σ = 2893048012800. Its totient is φ = 1427004260640.

The previous prime is 2155145020291. The next prime is 2155145020321. The reversal of 2155145020311 is 1130205415512.

It is not a de Polignac number, because 2155145020311 - 2⁹ = 2155145019799 is a prime.

It is a super-3 number, since 3×2155145020311³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155145020321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5473686 + ... + 5854188.

It is an arithmetic number, because the mean of its divisors is an integer number (180815500800).

Almost surely, 2^{2155145020311} is an apocalyptic number.

2155145020311 is a deficient number, since it is larger than the sum of its proper divisors (737902992489).

2155145020311 is a wasteful number, since it uses less digits than its factorization.

2155145020311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393326.

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 2155145020311 in words is "two trillion, one hundred fifty-five billion, one hundred forty-five million, twenty thousand, three hundred eleven".