40516251 has 8 divisors (see below), whose sum is σ = 54556944. Its totient is φ = 26743200.

The previous prime is 40516247. The next prime is 40516279. The reversal of 40516251 is 15261504.

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

It is not a de Polignac number, because 40516251 - 2² = 40516247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40516211) 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, 66556 + ... + 67161.

It is an arithmetic number, because the mean of its divisors is an integer number (6819618).

Almost surely, 2^40516251 is an apocalyptic number.

40516251 is a deficient number, since it is larger than the sum of its proper divisors (14040693).

40516251 is a wasteful number, since it uses less digits than its factorization.

40516251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133821.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 40516251 is about 6365.2377017673. The cubic root of 40516251 is about 343.4601993426.

Adding to 40516251 its reverse (15261504), we get a palindrome (55777755).

The spelling of 40516251 in words is "forty million, five hundred sixteen thousand, two hundred fifty-one".