40145511 has 16 divisors (see below), whose sum is σ = 63834624. Its totient is φ = 21942624.

The previous prime is 40145489. The next prime is 40145513. The reversal of 40145511 is 11554104.

It is not a de Polignac number, because 40145511 - 2⁶ = 40145447 is a prime.

It is a super-2 number, since 2×40145511² = 3223324106902242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40145513) 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, 41076 + ... + 42041.

It is an arithmetic number, because the mean of its divisors is an integer number (3989664).

Almost surely, 2^40145511 is an apocalyptic number.

40145511 is a deficient number, since it is larger than the sum of its proper divisors (23689113).

40145511 is a wasteful number, since it uses less digits than its factorization.

40145511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83150.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 40145511 is about 6336.0485320111. The cubic root of 40145511 is about 342.4093880034.

Adding to 40145511 its reverse (11554104), we get a palindrome (51699615).

The spelling of 40145511 in words is "forty million, one hundred forty-five thousand, five hundred eleven".