2138421752 has 8 divisors (see below), whose sum is σ = 4009540800. Its totient is φ = 1069210872.

The previous prime is 2138421751. The next prime is 2138421787. The reversal of 2138421752 is 2571248312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138421751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133651352 + ... + 133651367.

It is an arithmetic number, because the mean of its divisors is an integer number (501192600).

Almost surely, 2^2138421752 is an apocalyptic number.

It is an amenable number.

2138421752 is a deficient number, since it is larger than the sum of its proper divisors (1871119048).

2138421752 is a wasteful number, since it uses less digits than its factorization.

2138421752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267302725 (or 267302721 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 2138421752 is about 46243.0724757774. The cubic root of 2138421752 is about 1288.3418697588.

The spelling of 2138421752 in words is "two billion, one hundred thirty-eight million, four hundred twenty-one thousand, seven hundred fifty-two".