40503561 has 8 divisors (see below), whose sum is σ = 61719744. Its totient is φ = 23144880.

The previous prime is 40503557. The next prime is 40503563. The reversal of 40503561 is 16530504.

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

It is not a de Polignac number, because 40503561 - 2² = 40503557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40503563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964350 + ... + 964391.

It is an arithmetic number, because the mean of its divisors is an integer number (7714968).

Almost surely, 2^40503561 is an apocalyptic number.

It is an amenable number.

40503561 is a deficient number, since it is larger than the sum of its proper divisors (21216183).

40503561 is a wasteful number, since it uses less digits than its factorization.

40503561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928751.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 40503561 is about 6364.2408031123. The cubic root of 40503561 is about 343.4243374770.

The spelling of 40503561 in words is "forty million, five hundred three thousand, five hundred sixty-one".