40145331 has 4 divisors (see below), whose sum is σ = 53527112. Its totient is φ = 26763552.

The previous prime is 40145321. The next prime is 40145353. The reversal of 40145331 is 13354104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40145331 - 2⁵ = 40145299 is a prime.

It is a super-2 number, since 2×40145331² = 3223295202199122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40145298 and 40145307.

It is not an unprimeable number, because it can be changed into a prime (40145321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6690886 + ... + 6690891.

It is an arithmetic number, because the mean of its divisors is an integer number (13381778).

Almost surely, 2^40145331 is an apocalyptic number.

40145331 is a deficient number, since it is larger than the sum of its proper divisors (13381781).

40145331 is a wasteful number, since it uses less digits than its factorization.

40145331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381780.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40145331 is about 6336.0343275585. The cubic root of 40145331 is about 342.4088762502.

Adding to 40145331 its reverse (13354104), we get a palindrome (53499435).

The spelling of 40145331 in words is "forty million, one hundred forty-five thousand, three hundred thirty-one".