2431642081 has 4 divisors (see below), whose sum is σ = 2652700464. Its totient is φ = 2210583700.

The previous prime is 2431642061. The next prime is 2431642099. The reversal of 2431642081 is 1802461342.

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 a cyclic number.

It is not a de Polignac number, because 2431642081 - 2⁵ = 2431642049 is a prime.

It is a super-2 number, since 2×2431642081² = 11825766420180021122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2431642001) 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, 110529175 + ... + 110529196.

It is an arithmetic number, because the mean of its divisors is an integer number (663175116).

Almost surely, 2^2431642081 is an apocalyptic number.

It is an amenable number.

2431642081 is a deficient number, since it is larger than the sum of its proper divisors (221058383).

2431642081 is a wasteful number, since it uses less digits than its factorization.

2431642081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221058382.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 2431642081 is about 49311.6830071739. The cubic root of 2431642081 is about 1344.7241882727.

The spelling of 2431642081 in words is "two billion, four hundred thirty-one million, six hundred forty-two thousand, eighty-one".