40672221 has 8 divisors (see below), whose sum is σ = 54423744. Its totient is φ = 27017760.

The previous prime is 40672207. The next prime is 40672223. The reversal of 40672221 is 12227604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40672221 - 2⁶ = 40672157 is a prime.

It is a super-2 number, since 2×40672221² = 3308459122145682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40672191 and 40672200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40672223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23281 + ... + 24966.

It is an arithmetic number, because the mean of its divisors is an integer number (6802968).

Almost surely, 2^40672221 is an apocalyptic number.

It is an amenable number.

40672221 is a deficient number, since it is larger than the sum of its proper divisors (13751523).

40672221 is a wasteful number, since it uses less digits than its factorization.

40672221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48531.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 40672221 is about 6377.4776361819. The cubic root of 40672221 is about 343.9003593018.

Adding to 40672221 its reverse (12227604), we get a palindrome (52899825).

It can be divided in two parts, 406 and 72221, that added together give a palindrome (72627).

The spelling of 40672221 in words is "forty million, six hundred seventy-two thousand, two hundred twenty-one".