40521337 has 2 divisors, whose sum is σ = 40521338. Its totient is φ = 40521336.

The previous prime is 40521329. The next prime is 40521361. The reversal of 40521337 is 73312504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39639616 + 881721 = 6296^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 40521337 - 2³ = 40521329 is a prime.

It is not a weakly prime, because it can be changed into another prime (40521367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260668 + 20260669.

It is an arithmetic number, because the mean of its divisors is an integer number (20260669).

Almost surely, 2^40521337 is an apocalyptic number.

It is an amenable number.

40521337 is a deficient number, since it is larger than the sum of its proper divisors (1).

40521337 is an equidigital number, since it uses as much as digits as its factorization.

40521337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 40521337 is about 6365.6372029829. The cubic root of 40521337 is about 343.4745702468.

The spelling of 40521337 in words is "forty million, five hundred twenty-one thousand, three hundred thirty-seven".