40523257 has 16 divisors (see below), whose sum is σ = 45619200. Its totient is φ = 35769600.

The previous prime is 40523233. The next prime is 40523261. The reversal of 40523257 is 75232504.

It is a cyclic number.

It is not a de Polignac number, because 40523257 - 2¹⁹ = 39998969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40523207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34632 + ... + 35782.

It is an arithmetic number, because the mean of its divisors is an integer number (2851200).

Almost surely, 2^40523257 is an apocalyptic number.

It is an amenable number.

40523257 is a deficient number, since it is larger than the sum of its proper divisors (5095943).

40523257 is a wasteful number, since it uses less digits than its factorization.

40523257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 40523257 is about 6365.7880109221. The cubic root of 40523257 is about 343.4799950494.

The spelling of 40523257 in words is "forty million, five hundred twenty-three thousand, two hundred fifty-seven".