40515899 has 2 divisors, whose sum is σ = 40515900. Its totient is φ = 40515898.

The previous prime is 40515889. The next prime is 40515919. The reversal of 40515899 is 99851504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40515899 - 2¹² = 40511803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40515829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20257949 + 20257950.

It is an arithmetic number, because the mean of its divisors is an integer number (20257950).

Almost surely, 2^40515899 is an apocalyptic number.

40515899 is a deficient number, since it is larger than the sum of its proper divisors (1).

40515899 is an equidigital number, since it uses as much as digits as its factorization.

40515899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 40515899 is about 6365.2100515223. The cubic root of 40515899 is about 343.4592046937.

It can be divided in two parts, 40515 and 899, that added together give a palindrome (41414).

The spelling of 40515899 in words is "forty million, five hundred fifteen thousand, eight hundred ninety-nine".