2155280445 has 48 divisors (see below), whose sum is σ = 3774576000. Its totient is φ = 1137628800.

The previous prime is 2155280423. The next prime is 2155280461. The reversal of 2155280445 is 5440825512.

2155280445 is a `hidden beast` number, since 21 + 552 + 80 + 4 + 4 + 5 = 666.

2155280445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2155280445 - 2¹¹ = 2155278397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2050170 + ... + 2051220.

It is an arithmetic number, because the mean of its divisors is an integer number (78637000).

Almost surely, 2^2155280445 is an apocalyptic number.

It is an amenable number.

2155280445 is a deficient number, since it is larger than the sum of its proper divisors (1619295555).

2155280445 is a wasteful number, since it uses less digits than its factorization.

2155280445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

The square root of 2155280445 is about 46424.9980613893. The cubic root of 2155280445 is about 1291.7186484988.

The spelling of 2155280445 in words is "two billion, one hundred fifty-five million, two hundred eighty thousand, four hundred forty-five".