40214021 has 8 divisors (see below), whose sum is σ = 41072664. Its totient is φ = 39363840.

The previous prime is 40214011. The next prime is 40214033. The reversal of 40214021 is 12041204.

It can be written as a sum of positive squares in 4 ways, for example, as 1600225 + 38613796 = 1265^2 + 6214^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40214021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40213987 and 40214005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40214011) 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, 7991 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (5134083).

Almost surely, 2^40214021 is an apocalyptic number.

It is an amenable number.

40214021 is a deficient number, since it is larger than the sum of its proper divisors (858643).

40214021 is a wasteful number, since it uses less digits than its factorization.

40214021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 40214021 is about 6341.4525938463. The cubic root of 40214021 is about 342.6040559745.

Adding to 40214021 its reverse (12041204), we get a palindrome (52255225).

The spelling of 40214021 in words is "forty million, two hundred fourteen thousand, twenty-one".