40525213 has 2 divisors, whose sum is σ = 40525214. Its totient is φ = 40525212.

The previous prime is 40525207. The next prime is 40525273. The reversal of 40525213 is 31252504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39275289 + 1249924 = 6267^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 40525213 - 2⁵ = 40525181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40525273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20262606 + 20262607.

It is an arithmetic number, because the mean of its divisors is an integer number (20262607).

Almost surely, 2^40525213 is an apocalyptic number.

It is an amenable number.

40525213 is a deficient number, since it is larger than the sum of its proper divisors (1).

40525213 is an equidigital number, since it uses as much as digits as its factorization.

40525213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40525213 is about 6365.9416428365. The cubic root of 40525213 is about 343.4855213908.

Adding to 40525213 its reverse (31252504), we get a palindrome (71777717).

The spelling of 40525213 in words is "forty million, five hundred twenty-five thousand, two hundred thirteen".