40215333221 has 32 divisors (see below), whose sum is σ = 46878144768. Its totient is φ = 33789772800.

The previous prime is 40215333217. The next prime is 40215333239. The reversal of 40215333221 is 12233351204.

It is a happy number.

It is not a de Polignac number, because 40215333221 - 2² = 40215333217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40215333211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57368171 + ... + 57368871.

It is an arithmetic number, because the mean of its divisors is an integer number (1464942024).

Almost surely, 2^40215333221 is an apocalyptic number.

It is an amenable number.

40215333221 is a deficient number, since it is larger than the sum of its proper divisors (6662811547).

40215333221 is a wasteful number, since it uses less digits than its factorization.

40215333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 40215333221 its reverse (12233351204), we get a palindrome (52448684425).

The spelling of 40215333221 in words is "forty billion, two hundred fifteen million, three hundred thirty-three thousand, two hundred twenty-one".