2139418431 has 24 divisors (see below), whose sum is σ = 3348156240. Its totient is φ = 1311158016.

The previous prime is 2139418429. The next prime is 2139418447. The reversal of 2139418431 is 1348149312.

2139418431 is a `hidden beast` number, since 213 + 9 + 4 + 1 + 8 + 431 = 666.

It is not a de Polignac number, because 2139418431 - 2¹ = 2139418429 is a prime.

It is a super-4 number, since 4×2139418431⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139418471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156016 + ... + 169173.

It is an arithmetic number, because the mean of its divisors is an integer number (139506510).

Almost surely, 2^2139418431 is an apocalyptic number.

2139418431 is a deficient number, since it is larger than the sum of its proper divisors (1208737809).

2139418431 is a wasteful number, since it uses less digits than its factorization.

2139418431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325255 (or 325252 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2139418431 is about 46253.8477426473. The cubic root of 2139418431 is about 1288.5419961439.

The spelling of 2139418431 in words is "two billion, one hundred thirty-nine million, four hundred eighteen thousand, four hundred thirty-one".