2138902431 has 8 divisors (see below), whose sum is σ = 2918192640. Its totient is φ = 1392773592.

The previous prime is 2138902427. The next prime is 2138902483. The reversal of 2138902431 is 1342098312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2138902431 - 2² = 2138902427 is a prime.

It is a super-2 number, since 2×2138902431² = 9149807218675419522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2138902392 and 2138902401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138902331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8290191 + ... + 8290448.

It is an arithmetic number, because the mean of its divisors is an integer number (364774080).

Almost surely, 2^2138902431 is an apocalyptic number.

2138902431 is a deficient number, since it is larger than the sum of its proper divisors (779290209).

2138902431 is a wasteful number, since it uses less digits than its factorization.

2138902431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16580685.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 2138902431 is about 46248.2694919496. The cubic root of 2138902431 is about 1288.4383946041.

The spelling of 2138902431 in words is "two billion, one hundred thirty-eight million, nine hundred two thousand, four hundred thirty-one".