40154431 has 2 divisors, whose sum is σ = 40154432. Its totient is φ = 40154430.

The previous prime is 40154423. The next prime is 40154441. The reversal of 40154431 is 13445104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40154431 - 2³ = 40154423 is a prime.

It is a super-2 number, since 2×40154431² = 3224756657867522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40154441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20077215 + 20077216.

It is an arithmetic number, because the mean of its divisors is an integer number (20077216).

Almost surely, 2^40154431 is an apocalyptic number.

40154431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40154431 is an equidigital number, since it uses as much as digits as its factorization.

40154431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40154431 is about 6336.7524016644. The cubic root of 40154431 is about 342.4347463019.

Adding to 40154431 its reverse (13445104), we get a palindrome (53599535).

The spelling of 40154431 in words is "forty million, one hundred fifty-four thousand, four hundred thirty-one".