40120231 has 4 divisors (see below), whose sum is σ = 41414464. Its totient is φ = 38826000.

The previous prime is 40120219. The next prime is 40120259. The reversal of 40120231 is 13202104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40120231 - 2⁹ = 40119719 is a prime.

It is a super-2 number, since 2×40120231² = 3219265870986722, 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 (40120271) 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, 647070 + ... + 647131.

It is an arithmetic number, because the mean of its divisors is an integer number (10353616).

Almost surely, 2^40120231 is an apocalyptic number.

40120231 is a deficient number, since it is larger than the sum of its proper divisors (1294233).

40120231 is a wasteful number, since it uses less digits than its factorization.

40120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294232.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40120231 is about 6334.0532836407. The cubic root of 40120231 is about 342.3375001244.

Adding to 40120231 its reverse (13202104), we get a palindrome (53322335).

The spelling of 40120231 in words is "forty million, one hundred twenty thousand, two hundred thirty-one".