2148999405 has 32 divisors (see below), whose sum is σ = 4035811584. Its totient is φ = 955846656.

The previous prime is 2148999403. The next prime is 2148999407. The reversal of 2148999405 is 5049998412.

It is an interprime number because it is at equal distance from previous prime (2148999403) and next prime (2148999407).

It is not a de Polignac number, because 2148999405 - 2¹ = 2148999403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2148999403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272692 + ... + 280461.

It is an arithmetic number, because the mean of its divisors is an integer number (126119112).

Almost surely, 2^2148999405 is an apocalyptic number.

It is an amenable number.

2148999405 is a deficient number, since it is larger than the sum of its proper divisors (1886812179).

2148999405 is a wasteful number, since it uses less digits than its factorization.

2148999405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553205.

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 2148999405 is about 46357.3015284540. The cubic root of 2148999405 is about 1290.4626277720.

The spelling of 2148999405 in words is "two billion, one hundred forty-eight million, nine hundred ninety-nine thousand, four hundred five".