2431422181 has 8 divisors (see below), whose sum is σ = 2497990040. Its totient is φ = 2364899328.

The previous prime is 2431422167. The next prime is 2431422209. The reversal of 2431422181 is 1812241342.

2431422181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 20131-st star number.

It can be written as a sum of positive squares in 4 ways, for example, as 510353281 + 1921068900 = 22591^2 + 43830^2 .

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

It is a 8-Lehmer number, since φ(2431422181) divides (2431422181-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 2431422181 - 2⁷ = 2431422053 is a prime.

It is a super-2 number, since 2×2431422181² = 11823627644517593522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2431422151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118405 + ... + 137413.

It is an arithmetic number, because the mean of its divisors is an integer number (312248755).

Almost surely, 2^2431422181 is an apocalyptic number.

It is an amenable number.

2431422181 is a deficient number, since it is larger than the sum of its proper divisors (66567859).

2431422181 is a wasteful number, since it uses less digits than its factorization.

2431422181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22503.

The product of its digits is 3072, while the sum is 28.

The square root of 2431422181 is about 49309.4532620267. The cubic root of 2431422181 is about 1344.6836513634.

The spelling of 2431422181 in words is "two billion, four hundred thirty-one million, four hundred twenty-two thousand, one hundred eighty-one".