40237561 has 8 divisors (see below), whose sum is σ = 49523264. Its totient is φ = 31836240.

The previous prime is 40237517. The next prime is 40237607. The reversal of 40237561 is 16573204.

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

It is a cyclic number.

It is not a de Polignac number, because 40237561 - 2⁷ = 40237433 is a prime.

It is a super-2 number, since 2×40237561² = 3238122630457442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40237501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220995 + ... + 221176.

It is an arithmetic number, because the mean of its divisors is an integer number (6190408).

Almost surely, 2^40237561 is an apocalyptic number.

It is an amenable number.

40237561 is a deficient number, since it is larger than the sum of its proper divisors (9285703).

40237561 is a wasteful number, since it uses less digits than its factorization.

40237561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442191.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 40237561 is about 6343.3083639375. The cubic root of 40237561 is about 342.6708927488.

The spelling of 40237561 in words is "forty million, two hundred thirty-seven thousand, five hundred sixty-one".