40000051 has 32 divisors (see below), whose sum is σ = 51480576. Its totient is φ = 30240000.

The previous prime is 40000033. The next prime is 40000061. The reversal of 40000051 is 15000004.

It is not a de Polignac number, because 40000051 - 2¹⁷ = 39868979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39999992 and 40000037.

It is not an unprimeable number, because it can be changed into a prime (40000021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264826 + ... + 264976.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^40000051 is an apocalyptic number.

40000051 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40000051 is a deficient number, since it is larger than the sum of its proper divisors (11480525).

40000051 is a wasteful number, since it uses less digits than its factorization.

40000051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 40000051 is about 6324.5593522395. The cubic root of 40000051 is about 341.9953346832.

Adding to 40000051 its reverse (15000004), we get a palindrome (55000055).

The spelling of 40000051 in words is "forty million, fifty-one", and thus it is an aban number and an uban number.