40529821 has 2 divisors, whose sum is σ = 40529822. Its totient is φ = 40529820.

The previous prime is 40529777. The next prime is 40529857. The reversal of 40529821 is 12892504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30360100 + 10169721 = 5510^2 + 3189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40529821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40529861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20264910 + 20264911.

It is an arithmetic number, because the mean of its divisors is an integer number (20264911).

Almost surely, 2^40529821 is an apocalyptic number.

It is an amenable number.

40529821 is a deficient number, since it is larger than the sum of its proper divisors (1).

40529821 is an equidigital number, since it uses as much as digits as its factorization.

40529821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40529821 is about 6366.3035585809. The cubic root of 40529821 is about 343.4985397990.

The spelling of 40529821 in words is "forty million, five hundred twenty-nine thousand, eight hundred twenty-one".