40531405 has 16 divisors (see below), whose sum is σ = 51217920. Its totient is φ = 30731008.

The previous prime is 40531373. The next prime is 40531423. The reversal of 40531405 is 50413504.

It is a cyclic number.

It is not a de Polignac number, because 40531405 - 2⁵ = 40531373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11436 + ... + 14554.

It is an arithmetic number, because the mean of its divisors is an integer number (3201120).

Almost surely, 2^40531405 is an apocalyptic number.

It is an amenable number.

40531405 is a deficient number, since it is larger than the sum of its proper divisors (10686515).

40531405 is a wasteful number, since it uses less digits than its factorization.

40531405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40531405 is about 6366.4279623663. The cubic root of 40531405 is about 343.5030146489.

Adding to 40531405 its reverse (50413504), we get a palindrome (90944909).

The spelling of 40531405 in words is "forty million, five hundred thirty-one thousand, four hundred five".