40015481 has 4 divisors (see below), whose sum is σ = 43653264. Its totient is φ = 36377700.

The previous prime is 40015441. The next prime is 40015483. The reversal of 40015481 is 18451004.

40015481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40015481 - 2¹⁴ = 39999097 is a prime.

It is a super-2 number, since 2×40015481² = 3202477439322722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40015483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1818875 + ... + 1818896.

It is an arithmetic number, because the mean of its divisors is an integer number (10913316).

Almost surely, 2^40015481 is an apocalyptic number.

It is an amenable number.

40015481 is a deficient number, since it is larger than the sum of its proper divisors (3637783).

40015481 is a wasteful number, since it uses less digits than its factorization.

40015481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637782.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 40015481 is about 6325.7790824530. The cubic root of 40015481 is about 342.0393038741.

Adding to 40015481 its reverse (18451004), we get a palindrome (58466485).

The spelling of 40015481 in words is "forty million, fifteen thousand, four hundred eighty-one".