40113521 has 8 divisors (see below), whose sum is σ = 46037760. Its totient is φ = 34237728.

The previous prime is 40113511. The next prime is 40113581. The reversal of 40113521 is 12531104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40113521 - 2²² = 35919217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40113521.

It is not an unprimeable number, because it can be changed into a prime (40113511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10316 + ... + 13661.

It is an arithmetic number, because the mean of its divisors is an integer number (5754720).

Almost surely, 2^40113521 is an apocalyptic number.

It is an amenable number.

40113521 is a deficient number, since it is larger than the sum of its proper divisors (5924239).

40113521 is a wasteful number, since it uses less digits than its factorization.

40113521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24223.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 40113521 is about 6333.5235848617. The cubic root of 40113521 is about 342.3184140537.

Adding to 40113521 its reverse (12531104), we get a palindrome (52644625).

The spelling of 40113521 in words is "forty million, one hundred thirteen thousand, five hundred twenty-one".