40290051 has 16 divisors (see below), whose sum is σ = 59875200. Its totient is φ = 23948928.

The previous prime is 40290023. The next prime is 40290053. The reversal of 40290051 is 15009204.

It is not a de Polignac number, because 40290051 - 2⁷ = 40289923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40290053) 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, 19821 + ... + 21758.

It is an arithmetic number, because the mean of its divisors is an integer number (3742200).

Almost surely, 2^40290051 is an apocalyptic number.

40290051 is a deficient number, since it is larger than the sum of its proper divisors (19585149).

40290051 is a wasteful number, since it uses less digits than its factorization.

40290051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41618.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 40290051 is about 6347.4444463894. Note that the first 5 decimals coincide. The cubic root of 40290051 is about 342.8198330185.

Adding to 40290051 its reverse (15009204), we get a palindrome (55299255).

The spelling of 40290051 in words is "forty million, two hundred ninety thousand, fifty-one".