40011851 has 8 divisors (see below), whose sum is σ = 45154800. Its totient is φ = 35119840.

The previous prime is 40011827. The next prime is 40011877. The reversal of 40011851 is 15811004.

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 40011851 - 2¹⁸ = 39749707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40011151) 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, 62396 + ... + 63033.

It is an arithmetic number, because the mean of its divisors is an integer number (5644350).

Almost surely, 2^40011851 is an apocalyptic number.

40011851 is a deficient number, since it is larger than the sum of its proper divisors (5142949).

40011851 is a wasteful number, since it uses less digits than its factorization.

40011851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125469.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 40011851 is about 6325.4921547655. The cubic root of 40011851 is about 342.0289608752.

Adding to 40011851 its reverse (15811004), we get a palindrome (55822855).

The spelling of 40011851 in words is "forty million, eleven thousand, eight hundred fifty-one".