40523261 has 2 divisors, whose sum is σ = 40523262. Its totient is φ = 40523260.

The previous prime is 40523233. The next prime is 40523317. The reversal of 40523261 is 16232504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34739236 + 5784025 = 5894^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 40523261 - 2¹⁴ = 40506877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40523201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20261630 + 20261631.

It is an arithmetic number, because the mean of its divisors is an integer number (20261631).

Almost surely, 2^40523261 is an apocalyptic number.

It is an amenable number.

40523261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40523261 is an equidigital number, since it uses as much as digits as its factorization.

40523261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40523261 is about 6365.7883251016. The cubic root of 40523261 is about 343.4800063509.

Adding to 40523261 its reverse (16232504), we get a palindrome (56755765).

The spelling of 40523261 in words is "forty million, five hundred twenty-three thousand, two hundred sixty-one".