40115554 has 4 divisors (see below), whose sum is σ = 60173334. Its totient is φ = 20057776.

The previous prime is 40115527. The next prime is 40115557. The reversal of 40115554 is 45551104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32798529 + 7317025 = 5727^2 + 2705^2 .

It is not an unprimeable number, because it can be changed into a prime (40115557) 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 as a sum of consecutive naturals, namely, 10028887 + ... + 10028890.

Almost surely, 2^40115554 is an apocalyptic number.

40115554 is a deficient number, since it is larger than the sum of its proper divisors (20057780).

40115554 is a wasteful number, since it uses less digits than its factorization.

40115554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20057779.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 40115554 is about 6333.6840780070. The cubic root of 40115554 is about 342.3241969881.

Adding to 40115554 its reverse (45551104), we get a palindrome (85666658).

The spelling of 40115554 in words is "forty million, one hundred fifteen thousand, five hundred fifty-four".