40540523 has 4 divisors (see below), whose sum is σ = 40574688. Its totient is φ = 40506360.

The previous prime is 40540519. The next prime is 40540543. The reversal of 40540523 is 32504504.

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 40540523 - 2² = 40540519 is a prime.

It is a super-2 number, since 2×40540523² = 3287068010227058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40540543) 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, 15236 + ... + 17697.

It is an arithmetic number, because the mean of its divisors is an integer number (10143672).

Almost surely, 2^40540523 is an apocalyptic number.

40540523 is a deficient number, since it is larger than the sum of its proper divisors (34165).

40540523 is a wasteful number, since it uses less digits than its factorization.

40540523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34164.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 40540523 is about 6367.1440222442. The cubic root of 40540523 is about 343.5287710194.

The spelling of 40540523 in words is "forty million, five hundred forty thousand, five hundred twenty-three".