40213307 has 2 divisors, whose sum is σ = 40213308. Its totient is φ = 40213306.

The previous prime is 40213297. The next prime is 40213309. The reversal of 40213307 is 70331204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40213307 - 2¹⁶ = 40147771 is a prime.

It is a super-2 number, since 2×40213307² = 3234220119752498, which contains 22 as substring.

Together with 40213309, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40213309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106653 + 20106654.

It is an arithmetic number, because the mean of its divisors is an integer number (20106654).

Almost surely, 2^40213307 is an apocalyptic number.

40213307 is a deficient number, since it is larger than the sum of its proper divisors (1).

40213307 is an equidigital number, since it uses as much as digits as its factorization.

40213307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 40213307 is about 6341.3962973465. The cubic root of 40213307 is about 342.6020283173.

The spelling of 40213307 in words is "forty million, two hundred thirteen thousand, three hundred seven".