40145015 has 16 divisors (see below), whose sum is σ = 50118816. Its totient is φ = 30844800.

The previous prime is 40144991. The next prime is 40145023. The reversal of 40145015 is 51054104.

It is not a de Polignac number, because 40145015 - 2⁸ = 40144759 is a prime.

It is a super-2 number, since 2×40145015² = 3223244458700450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11585 + ... + 14645.

It is an arithmetic number, because the mean of its divisors is an integer number (3132426).

Almost surely, 2^40145015 is an apocalyptic number.

40145015 is a deficient number, since it is larger than the sum of its proper divisors (9973801).

40145015 is a wasteful number, since it uses less digits than its factorization.

40145015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 40145015 is about 6336.0093907759. The cubic root of 40145015 is about 342.4079778353.

Adding to 40145015 its reverse (51054104), we get a palindrome (91199119).

The spelling of 40145015 in words is "forty million, one hundred forty-five thousand, fifteen".