40133021 has 2 divisors, whose sum is σ = 40133022. Its totient is φ = 40133020.

The previous prime is 40132987. The next prime is 40133033. The reversal of 40133021 is 12033104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28504921 + 11628100 = 5339^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 40133021 - 2⁶ = 40132957 is a prime.

It is a super-2 number, since 2×40133021² = 3221318749172882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40132987 and 40133005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40133081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20066510 + 20066511.

It is an arithmetic number, because the mean of its divisors is an integer number (20066511).

Almost surely, 2^40133021 is an apocalyptic number.

It is an amenable number.

40133021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40133021 is an equidigital number, since it uses as much as digits as its factorization.

40133021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 40133021 is about 6335.0628252607. The cubic root of 40133021 is about 342.3738743868.

Adding to 40133021 its reverse (12033104), we get a palindrome (52166125).

The spelling of 40133021 in words is "forty million, one hundred thirty-three thousand, twenty-one".