40231161 has 10 divisors (see below), whose sum is σ = 60098522. Its totient is φ = 26820720.

The previous prime is 40231157. The next prime is 40231183. The reversal of 40231161 is 16113204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 33698025 + 6533136 = 5805^2 + 2556^2 .

It is not a de Polignac number, because 40231161 - 2² = 40231157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40231111) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 248260 + ... + 248421.

Almost surely, 2^40231161 is an apocalyptic number.

It is an amenable number.

40231161 is a deficient number, since it is larger than the sum of its proper divisors (19867361).

40231161 is an equidigital number, since it uses as much as digits as its factorization.

40231161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496693 (or 496684 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 40231161 is about 6342.8038752590. The cubic root of 40231161 is about 342.6527239041.

Adding to 40231161 its reverse (16113204), we get a palindrome (56344365).

It can be divided in two parts, 4023 and 1161, that added together give a square (5184 = 72²).

The spelling of 40231161 in words is "forty million, two hundred thirty-one thousand, one hundred sixty-one".