40226721 has 8 divisors (see below), whose sum is σ = 54314880. Its totient is φ = 26478192.

The previous prime is 40226713. The next prime is 40226729. The reversal of 40226721 is 12762204.

It is an interprime number because it is at equal distance from previous prime (40226713) and next prime (40226729).

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

It is not a de Polignac number, because 40226721 - 2³ = 40226713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40226691 and 40226700.

It is not an unprimeable number, because it can be changed into a prime (40226729) 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, 84630 + ... + 85103.

It is an arithmetic number, because the mean of its divisors is an integer number (6789360).

Almost surely, 2^40226721 is an apocalyptic number.

It is an amenable number.

40226721 is a deficient number, since it is larger than the sum of its proper divisors (14088159).

40226721 is a wasteful number, since it uses less digits than its factorization.

40226721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169815.

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

The square root of 40226721 is about 6342.4538626623. The cubic root of 40226721 is about 342.6401181359.

Adding to 40226721 its reverse (12762204), we get a palindrome (52988925).

The spelling of 40226721 in words is "forty million, two hundred twenty-six thousand, seven hundred twenty-one".