40523557 has 4 divisors (see below), whose sum is σ = 40563820. Its totient is φ = 40483296.

The previous prime is 40523537. The next prime is 40523573. The reversal of 40523557 is 75532504.

40523557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39955041 + 568516 = 6321^2 + 754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40523557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40523537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18582 + ... + 20647.

It is an arithmetic number, because the mean of its divisors is an integer number (10140955).

Almost surely, 2^40523557 is an apocalyptic number.

It is an amenable number.

40523557 is a deficient number, since it is larger than the sum of its proper divisors (40263).

40523557 is a wasteful number, since it uses less digits than its factorization.

40523557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40262.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 40523557 is about 6365.8115743399. The cubic root of 40523557 is about 343.4808426593.

The spelling of 40523557 in words is "forty million, five hundred twenty-three thousand, five hundred fifty-seven".