40227521 has 4 divisors (see below), whose sum is σ = 40298544. Its totient is φ = 40156500.

The previous prime is 40227493. The next prime is 40227563. The reversal of 40227521 is 12572204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40227521 - 2¹⁸ = 39965377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40227571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34655 + ... + 35796.

It is an arithmetic number, because the mean of its divisors is an integer number (10074636).

Almost surely, 2^40227521 is an apocalyptic number.

It is an amenable number.

40227521 is a deficient number, since it is larger than the sum of its proper divisors (71023).

40227521 is an equidigital number, since it uses as much as digits as its factorization.

40227521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71022.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 40227521 is about 6342.5169294216. The cubic root of 40227521 is about 342.6423895140.

Adding to 40227521 its reverse (12572204), we get a palindrome (52799725).

The spelling of 40227521 in words is "forty million, two hundred twenty-seven thousand, five hundred twenty-one".