40783221 has 24 divisors (see below), whose sum is σ = 63835200. Its totient is φ = 24990336.

The previous prime is 40783217. The next prime is 40783229. The reversal of 40783221 is 12238704.

It is not a de Polignac number, because 40783221 - 2² = 40783217 is a prime.

It is a super-2 number, since 2×40783221² = 3326542230269682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40783229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3480 + ... + 9678.

It is an arithmetic number, because the mean of its divisors is an integer number (2659800).

Almost surely, 2^40783221 is an apocalyptic number.

It is an amenable number.

40783221 is a deficient number, since it is larger than the sum of its proper divisors (23051979).

40783221 is a wasteful number, since it uses less digits than its factorization.

40783221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6265 (or 6262 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 40783221 is about 6386.1742068315. The cubic root of 40783221 is about 344.2129253492.

The spelling of 40783221 in words is "forty million, seven hundred eighty-three thousand, two hundred twenty-one".