2154403215 has 24 divisors (see below), whose sum is σ = 3896661600. Its totient is φ = 1099057344.

The previous prime is 2154403213. The next prime is 2154403241. The reversal of 2154403215 is 5123044512.

2154403215 is a `hidden beast` number, since 2 + 1 + 5 + 440 + 3 + 215 = 666.

It is not a de Polignac number, because 2154403215 - 2¹ = 2154403213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154403211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1039740 + ... + 1041809.

It is an arithmetic number, because the mean of its divisors is an integer number (162360900).

Almost surely, 2^2154403215 is an apocalyptic number.

2154403215 is a deficient number, since it is larger than the sum of its proper divisors (1742258385).

2154403215 is a wasteful number, since it uses less digits than its factorization.

2154403215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081583 (or 2081580 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2154403215 is about 46415.5492803866. The cubic root of 2154403215 is about 1291.5433753890.

Adding to 2154403215 its reverse (5123044512), we get a palindrome (7277447727).

The spelling of 2154403215 in words is "two billion, one hundred fifty-four million, four hundred three thousand, two hundred fifteen".