40055261 has 2 divisors, whose sum is σ = 40055262. Its totient is φ = 40055260.

The previous prime is 40055243. The next prime is 40055269. The reversal of 40055261 is 16255004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 19307236 = 4555^2 + 4394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40055261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40055269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20027630 + 20027631.

It is an arithmetic number, because the mean of its divisors is an integer number (20027631).

Almost surely, 2^40055261 is an apocalyptic number.

It is an amenable number.

40055261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40055261 is an equidigital number, since it uses as much as digits as its factorization.

40055261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 40055261 is about 6328.9225781329. The cubic root of 40055261 is about 342.1526084994.

The spelling of 40055261 in words is "forty million, fifty-five thousand, two hundred sixty-one".