2154402405 has 48 divisors (see below), whose sum is σ = 3825956160. Its totient is φ = 1121105664.

The previous prime is 2154402391. The next prime is 2154402413. The reversal of 2154402405 is 5042044512.

2154402405 is a `hidden beast` number, since 215 + 4 + 40 + 2 + 405 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-2154402405 is a prime.

It is a Curzon number.

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, 360774 + ... + 366696.

It is an arithmetic number, because the mean of its divisors is an integer number (79707420).

Almost surely, 2^2154402405 is an apocalyptic number.

It is an amenable number.

2154402405 is a deficient number, since it is larger than the sum of its proper divisors (1671553755).

2154402405 is a wasteful number, since it uses less digits than its factorization.

2154402405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6130 (or 6127 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2154402405 is about 46415.5405548616. The cubic root of 2154402405 is about 1291.5432135266.

Adding to 2154402405 its reverse (5042044512), we get a palindrome (7196446917).

The spelling of 2154402405 in words is "two billion, one hundred fifty-four million, four hundred two thousand, four hundred five".