40010431221 has 10 divisors (see below), whose sum is σ = 59768668982. Its totient is φ = 26673620760.

The previous prime is 40010431217. The next prime is 40010431229. The reversal of 40010431221 is 12213401004.

40010431221 is a `hidden beast` number, since 4 + 0 + 0 + 10 + 431 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 37515428721 + 2495002500 = 193689^2 + 49950^2 .

It is not a de Polignac number, because 40010431221 - 2² = 40010431217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40010431194 and 40010431203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40010431229) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 246977890 + ... + 246978051.

Almost surely, 2^40010431221 is an apocalyptic number.

It is an amenable number.

40010431221 is a deficient number, since it is larger than the sum of its proper divisors (19758237761).

40010431221 is an equidigital number, since it uses as much as digits as its factorization.

40010431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493955953 (or 493955944 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 40010431221 its reverse (12213401004), we get a palindrome (52223832225).

The spelling of 40010431221 in words is "forty billion, ten million, four hundred thirty-one thousand, two hundred twenty-one".