40545511 has 4 divisors (see below), whose sum is σ = 40647024. Its totient is φ = 40444000.

The previous prime is 40545467. The next prime is 40545521. The reversal of 40545511 is 11554504.

It is a happy number.

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 40545511 - 2⁷ = 40545383 is a prime.

It is a super-2 number, since 2×40545511² = 3287876924502242, 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 (40545521) 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, 50155 + ... + 50956.

It is an arithmetic number, because the mean of its divisors is an integer number (10161756).

Almost surely, 2^40545511 is an apocalyptic number.

40545511 is a deficient number, since it is larger than the sum of its proper divisors (101513).

40545511 is a wasteful number, since it uses less digits than its factorization.

40545511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101512.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 40545511 is about 6367.5357085767. The cubic root of 40545511 is about 343.5428594024.

The spelling of 40545511 in words is "forty million, five hundred forty-five thousand, five hundred eleven".