40331261 has 2 divisors, whose sum is σ = 40331262. Its totient is φ = 40331260.

The previous prime is 40331237. The next prime is 40331273. The reversal of 40331261 is 16213304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36602500 + 3728761 = 6050^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 40331261 - 2⁶ = 40331197 is a prime.

It is a super-2 number, since 2×40331261² = 3253221227700242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40331201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20165630 + 20165631.

It is an arithmetic number, because the mean of its divisors is an integer number (20165631).

Almost surely, 2^40331261 is an apocalyptic number.

It is an amenable number.

40331261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40331261 is an equidigital number, since it uses as much as digits as its factorization.

40331261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40331261 is about 6350.6898050527. The cubic root of 40331261 is about 342.9366756878.

Adding to 40331261 its reverse (16213304), we get a palindrome (56544565).

The spelling of 40331261 in words is "forty million, three hundred thirty-one thousand, two hundred sixty-one".