2155217015570 has 16 divisors (see below), whose sum is σ = 3881444336280. Its totient is φ = 861630426624.

The previous prime is 2155217015569. The next prime is 2155217015579. The reversal of 2155217015570 is 755107125512.

It can be written as a sum of positive squares in 4 ways, for example, as 1403540153521 + 751676862049 = 1184711^2 + 866993^2 .

It is not an unprimeable number, because it can be changed into a prime (2155217015579) 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 7 ways as a sum of consecutive naturals, for example, 57027617 + ... + 57065396.

Almost surely, 2^{2155217015570} is an apocalyptic number.

2155217015570 is a deficient number, since it is larger than the sum of its proper divisors (1726227320710).

2155217015570 is a wasteful number, since it uses less digits than its factorization.

2155217015570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114094909.

The product of its (nonzero) digits is 122500, while the sum is 41.

The spelling of 2155217015570 in words is "two trillion, one hundred fifty-five billion, two hundred seventeen million, fifteen thousand, five hundred seventy".