2138952385 has 4 divisors (see below), whose sum is σ = 2566742868. Its totient is φ = 1711161904.

The previous prime is 2138952383. The next prime is 2138952401. The reversal of 2138952385 is 5832598312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1413835201 + 725117184 = 37601^2 + 26928^2 .

It is a cyclic number.

It is not a de Polignac number, because 2138952385 - 2¹ = 2138952383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2138952383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213895234 + ... + 213895243.

It is an arithmetic number, because the mean of its divisors is an integer number (641685717).

Almost surely, 2^2138952385 is an apocalyptic number.

It is an amenable number.

2138952385 is a deficient number, since it is larger than the sum of its proper divisors (427790483).

2138952385 is an equidigital number, since it uses as much as digits as its factorization.

2138952385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427790482.

The product of its digits is 518400, while the sum is 46.

The square root of 2138952385 is about 46248.8095522469. The cubic root of 2138952385 is about 1288.4484250056.

It can be divided in two parts, 213 and 8952385, that added together give a palindrome (8952598).

The spelling of 2138952385 in words is "two billion, one hundred thirty-eight million, nine hundred fifty-two thousand, three hundred eighty-five".