40771221 has 4 divisors (see below), whose sum is σ = 54361632. Its totient is φ = 27180812.

The previous prime is 40771217. The next prime is 40771223. The reversal of 40771221 is 12217704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40771221 - 2² = 40771217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40771191 and 40771200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40771223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6795201 + ... + 6795206.

It is an arithmetic number, because the mean of its divisors is an integer number (13590408).

Almost surely, 2^40771221 is an apocalyptic number.

It is an amenable number.

40771221 is a deficient number, since it is larger than the sum of its proper divisors (13590411).

40771221 is a wasteful number, since it uses less digits than its factorization.

40771221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13590410.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 40771221 is about 6385.2346080626. The cubic root of 40771221 is about 344.1791617883.

Adding to 40771221 its reverse (12217704), we get a palindrome (52988925).

The spelling of 40771221 in words is "forty million, seven hundred seventy-one thousand, two hundred twenty-one".