40225521 has 12 divisors (see below), whose sum is σ = 62390832. Its totient is φ = 22985928.

The previous prime is 40225487. The next prime is 40225583. The reversal of 40225521 is 12552204.

It is a happy number.

It is not a de Polignac number, because 40225521 - 2¹¹ = 40223473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (40225421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136675 + ... + 136968.

It is an arithmetic number, because the mean of its divisors is an integer number (5199236).

Almost surely, 2^40225521 is an apocalyptic number.

It is an amenable number.

40225521 is a deficient number, since it is larger than the sum of its proper divisors (22165311).

40225521 is a wasteful number, since it uses less digits than its factorization.

40225521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273660 (or 273653 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 40225521 is about 6342.3592613475. The cubic root of 40225521 is about 342.6367110123.

Adding to 40225521 its reverse (12552204), we get a palindrome (52777725).

The spelling of 40225521 in words is "forty million, two hundred twenty-five thousand, five hundred twenty-one".