2185239405 has 16 divisors (see below), whose sum is σ = 3497148864. Its totient is φ = 1165205760.

The previous prime is 2185239367. The next prime is 2185239431. The reversal of 2185239405 is 5049325812.

It is not a de Polignac number, because 2185239405 - 2⁶ = 2185239341 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 15 ways as a sum of consecutive naturals, for example, 69622 + ... + 96008.

It is an arithmetic number, because the mean of its divisors is an integer number (218571804).

Almost surely, 2^2185239405 is an apocalyptic number.

It is an amenable number.

2185239405 is a deficient number, since it is larger than the sum of its proper divisors (1311909459).

2185239405 is a wasteful number, since it uses less digits than its factorization.

2185239405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31916.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 2185239405 is about 46746.5443107830. The cubic root of 2185239405 is about 1297.6762046255.

The spelling of 2185239405 in words is "two billion, one hundred eighty-five million, two hundred thirty-nine thousand, four hundred five".