2154161829 has 4 divisors (see below), whose sum is σ = 2872215776. Its totient is φ = 1436107884.

The previous prime is 2154161819. The next prime is 2154161837. The reversal of 2154161829 is 9281614512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2154161829 - 2⁷ = 2154161701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154161819) 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, 359026969 + ... + 359026974.

It is an arithmetic number, because the mean of its divisors is an integer number (718053944).

Almost surely, 2^2154161829 is an apocalyptic number.

It is an amenable number.

2154161829 is a deficient number, since it is larger than the sum of its proper divisors (718053947).

2154161829 is an equidigital number, since it uses as much as digits as its factorization.

2154161829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718053946.

The product of its digits is 34560, while the sum is 39.

The square root of 2154161829 is about 46412.9489366922. The cubic root of 2154161829 is about 1291.4951374158.

The spelling of 2154161829 in words is "two billion, one hundred fifty-four million, one hundred sixty-one thousand, eight hundred twenty-nine".