40851 has 16 divisors (see below), whose sum is σ = 64800. Its totient is φ = 25344.

The previous prime is 40849. The next prime is 40853. The reversal of 40851 is 15804.

It is an interprime number because it is at equal distance from previous prime (40849) and next prime (40853).

It is not a de Polignac number, because 40851 - 2¹ = 40849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40853) 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, 415 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (4050).

2⁴⁰⁸⁵¹ is an apocalyptic number.

40851 is a deficient number, since it is larger than the sum of its proper divisors (23949).

40851 is a wasteful number, since it uses less digits than its factorization.

40851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 40851 is about 202.1163031524. The cubic root of 40851 is about 34.4403506138.

The spelling of 40851 in words is "forty thousand, eight hundred fifty-one".