40383521 has 2 divisors, whose sum is σ = 40383522. Its totient is φ = 40383520.

The previous prime is 40383503. The next prime is 40383533. The reversal of 40383521 is 12538304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35700625 + 4682896 = 5975^2 + 2164^2 .

It is a cyclic number.

It is not a de Polignac number, because 40383521 - 2²² = 36189217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40383221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20191760 + 20191761.

It is an arithmetic number, because the mean of its divisors is an integer number (20191761).

Almost surely, 2^40383521 is an apocalyptic number.

It is an amenable number.

40383521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40383521 is an equidigital number, since it uses as much as digits as its factorization.

40383521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 40383521 is about 6354.8029867180. The cubic root of 40383521 is about 343.0847340006.

It can be divided in two parts, 40383 and 521, that added together give a palindrome (40904).

The spelling of 40383521 in words is "forty million, three hundred eighty-three thousand, five hundred twenty-one".