40533561 has 16 divisors (see below), whose sum is σ = 62121600. Its totient is φ = 26090064.

The previous prime is 40533553. The next prime is 40533569. The reversal of 40533561 is 16533504.

It is an interprime number because it is at equal distance from previous prime (40533553) and next prime (40533569).

It is not a de Polignac number, because 40533561 - 2³ = 40533553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40533569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25101 + ... + 26666.

It is an arithmetic number, because the mean of its divisors is an integer number (3882600).

Almost surely, 2^40533561 is an apocalyptic number.

It is an amenable number.

40533561 is a deficient number, since it is larger than the sum of its proper divisors (21588039).

40533561 is a wasteful number, since it uses less digits than its factorization.

40533561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51805 (or 51799 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 40533561 is about 6366.5972858349. The cubic root of 40533561 is about 343.5091052296.

The spelling of 40533561 in words is "forty million, five hundred thirty-three thousand, five hundred sixty-one".