40551 has 8 divisors (see below), whose sum is σ = 61824. Its totient is φ = 23160.

The previous prime is 40543. The next prime is 40559. The reversal of 40551 is 15504.

It is an interprime number because it is at equal distance from previous prime (40543) and next prime (40559).

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

It is not a de Polignac number, because 40551 - 2³ = 40543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40559) 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, 945 + ... + 986.

It is an arithmetic number, because the mean of its divisors is an integer number (7728).

2⁴⁰⁵⁵¹ is an apocalyptic number.

40551 is a deficient number, since it is larger than the sum of its proper divisors (21273).

40551 is a wasteful number, since it uses less digits than its factorization.

40551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 40551 is about 201.3727886285. The cubic root of 40551 is about 34.3558361502.

The spelling of 40551 in words is "forty thousand, five hundred fifty-one".