40000551 has 4 divisors (see below), whose sum is σ = 53334072. Its totient is φ = 26667032.

The previous prime is 40000549. The next prime is 40000561. The reversal of 40000551 is 15500004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40000551 - 2¹ = 40000549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40000551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6666756 + ... + 6666761.

It is an arithmetic number, because the mean of its divisors is an integer number (13333518).

Almost surely, 2^40000551 is an apocalyptic number.

40000551 is a deficient number, since it is larger than the sum of its proper divisors (13333521).

40000551 is a wasteful number, since it uses less digits than its factorization.

40000551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13333520.

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

The square root of 40000551 is about 6324.5988805615. The cubic root of 40000551 is about 341.9967596560.

Adding to 40000551 its reverse (15500004), we get a palindrome (55500555).

The spelling of 40000551 in words is "forty million, five hundred fifty-one", and thus it is an aban number.