2161429131 has 8 divisors (see below), whose sum is σ = 2981281680. Its totient is φ = 1391264672.

The previous prime is 2161429121. The next prime is 2161429133. The reversal of 2161429131 is 1319241612.

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

It is a cyclic number.

It is not a de Polignac number, because 2161429131 - 2⁷ = 2161429003 is a prime.

It is a super-2 number, since 2×2161429131² = 9343551776670830322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2161429133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12421920 + ... + 12422093.

It is an arithmetic number, because the mean of its divisors is an integer number (372660210).

Almost surely, 2^2161429131 is an apocalyptic number.

2161429131 is a deficient number, since it is larger than the sum of its proper divisors (819852549).

2161429131 is a wasteful number, since it uses less digits than its factorization.

2161429131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24844045.

The product of its digits is 2592, while the sum is 30.

The square root of 2161429131 is about 46491.1726137339. The cubic root of 2161429131 is about 1292.9458409267.

The spelling of 2161429131 in words is "two billion, one hundred sixty-one million, four hundred twenty-nine thousand, one hundred thirty-one".