2155445310 has 64 divisors (see below), whose sum is σ = 5454731520. Its totient is φ = 543594240.

The previous prime is 2155445297. The next prime is 2155445353. The reversal of 2155445310 is 135445512.

2155445310 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2155445310² = 9291888968801992200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363570 + ... + 369450.

It is an arithmetic number, because the mean of its divisors is an integer number (85230180).

Almost surely, 2^2155445310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155445310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2727365760).

2155445310 is an abundant number, since it is smaller than the sum of its proper divisors (3299286210).

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

2155445310 is a wasteful number, since it uses less digits than its factorization.

2155445310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6553.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2155445310 is about 46426.7736333250. The cubic root of 2155445310 is about 1291.7515836969.

The spelling of 2155445310 in words is "two billion, one hundred fifty-five million, four hundred forty-five thousand, three hundred ten".