40561305 has 32 divisors (see below), whose sum is σ = 68532480. Its totient is φ = 20444160.

The previous prime is 40561291. The next prime is 40561307. The reversal of 40561305 is 50316504.

It is not a de Polignac number, because 40561305 - 2⁴ = 40561289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40561307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30045 + ... + 31365.

It is an arithmetic number, because the mean of its divisors is an integer number (2141640).

Almost surely, 2^40561305 is an apocalyptic number.

It is an amenable number.

40561305 is a deficient number, since it is larger than the sum of its proper divisors (27971175).

40561305 is a wasteful number, since it uses less digits than its factorization.

40561305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 40561305 is about 6368.7757850312. The cubic root of 40561305 is about 343.5874612289.

Adding to 40561305 its reverse (50316504), we get a palindrome (90877809).

The spelling of 40561305 in words is "forty million, five hundred sixty-one thousand, three hundred five".