40570081 has 2 divisors, whose sum is σ = 40570082. Its totient is φ = 40570080.

The previous prime is 40570037. The next prime is 40570087. The reversal of 40570081 is 18007504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28729600 + 11840481 = 5360^2 + 3441^2 .

It is a cyclic number.

It is not a de Polignac number, because 40570081 - 2¹⁵ = 40537313 is a prime.

It is a super-2 number, since 2×40570081² = 3291862944693122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40570087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20285040 + 20285041.

It is an arithmetic number, because the mean of its divisors is an integer number (20285041).

Almost surely, 2^40570081 is an apocalyptic number.

It is an amenable number.

40570081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40570081 is an equidigital number, since it uses as much as digits as its factorization.

40570081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 40570081 is about 6369.4647341829. The cubic root of 40570081 is about 343.6122394103.

Adding to 40570081 its reverse (18007504), we get a palindrome (58577585).

The spelling of 40570081 in words is "forty million, five hundred seventy thousand, eighty-one".