40523145 has 16 divisors (see below), whose sum is σ = 69824832. Its totient is φ = 19949760.

The previous prime is 40523137. The next prime is 40523159. The reversal of 40523145 is 54132504.

It is not a de Polignac number, because 40523145 - 2³ = 40523137 is a prime.

It is a Curzon 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, 103711 + ... + 104100.

It is an arithmetic number, because the mean of its divisors is an integer number (4364052).

Almost surely, 2^40523145 is an apocalyptic number.

It is an amenable number.

40523145 is a deficient number, since it is larger than the sum of its proper divisors (29301687).

40523145 is a wasteful number, since it uses less digits than its factorization.

40523145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207832.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 40523145 is about 6365.7792138905. The cubic root of 40523145 is about 343.4796786073.

Adding to 40523145 its reverse (54132504), we get a palindrome (94655649).

The spelling of 40523145 in words is "forty million, five hundred twenty-three thousand, one hundred forty-five".