40361521 has 2 divisors, whose sum is σ = 40361522. Its totient is φ = 40361520.

The previous prime is 40361513. The next prime is 40361539. The reversal of 40361521 is 12516304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39551521 + 810000 = 6289^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 40361521 - 2³ = 40361513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40361492 and 40361501.

It is not a weakly prime, because it can be changed into another prime (40061521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20180760 + 20180761.

It is an arithmetic number, because the mean of its divisors is an integer number (20180761).

Almost surely, 2^40361521 is an apocalyptic number.

It is an amenable number.

40361521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40361521 is an equidigital number, since it uses as much as digits as its factorization.

40361521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 40361521 is about 6353.0717767077. The cubic root of 40361521 is about 343.0224211644.

Adding to 40361521 its reverse (12516304), we get a palindrome (52877825).

The spelling of 40361521 in words is "forty million, three hundred sixty-one thousand, five hundred twenty-one".