40154423 has 2 divisors, whose sum is σ = 40154424. Its totient is φ = 40154422.

The previous prime is 40154417. The next prime is 40154431. The reversal of 40154423 is 32445104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40154423 - 2⁴ = 40154407 is a prime.

It is a super-2 number, since 2×40154423² = 3224755372925858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40154123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20077211 + 20077212.

It is an arithmetic number, because the mean of its divisors is an integer number (20077212).

Almost surely, 2^40154423 is an apocalyptic number.

40154423 is a deficient number, since it is larger than the sum of its proper divisors (1).

40154423 is an equidigital number, since it uses as much as digits as its factorization.

40154423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40154423 is about 6336.7517704262. The cubic root of 40154423 is about 342.4347235607.

Adding to 40154423 its reverse (32445104), we get a palindrome (72599527).

The spelling of 40154423 in words is "forty million, one hundred fifty-four thousand, four hundred twenty-three".