40329521 has 2 divisors, whose sum is σ = 40329522. Its totient is φ = 40329520.

The previous prime is 40329503. The next prime is 40329551. The reversal of 40329521 is 12592304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37957921 + 2371600 = 6161^2 + 1540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40329521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40329551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20164760 + 20164761.

It is an arithmetic number, because the mean of its divisors is an integer number (20164761).

Almost surely, 2^40329521 is an apocalyptic number.

It is an amenable number.

40329521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40329521 is an equidigital number, since it uses as much as digits as its factorization.

40329521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40329521 is about 6350.5528105827. The cubic root of 40329521 is about 342.9317438774.

The spelling of 40329521 in words is "forty million, three hundred twenty-nine thousand, five hundred twenty-one".