4243561091 has 8 divisors (see below), whose sum is σ = 5290673664. Its totient is φ = 3306670920.

The previous prime is 4243561079. The next prime is 4243561129. The reversal of 4243561091 is 1901653424.

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

It is not a de Polignac number, because 4243561091 - 2¹⁸ = 4243298947 is a prime.

It is a super-2 number, since 2×4243561091² = 36015621466098220562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4243561001) 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, 27555515 + ... + 27555668.

It is an arithmetic number, because the mean of its divisors is an integer number (661334208).

Almost surely, 2^4243561091 is an apocalyptic number.

4243561091 is a deficient number, since it is larger than the sum of its proper divisors (1047112573).

4243561091 is a wasteful number, since it uses less digits than its factorization.

4243561091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55111201.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 4243561091 is about 65142.6211554310. The cubic root of 4243561091 is about 1618.9874649995.

The spelling of 4243561091 in words is "four billion, two hundred forty-three million, five hundred sixty-one thousand, ninety-one".