40145031 has 16 divisors (see below), whose sum is σ = 61393920. Its totient is φ = 25899480.

The previous prime is 40145023. The next prime is 40145059. The reversal of 40145031 is 13054104.

It is a happy number.

It is not a de Polignac number, because 40145031 - 2³ = 40145023 is a prime.

It is a super-2 number, since 2×40145031² = 3223247027981922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40144995 and 40145013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40145431) 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, 23145 + ... + 24818.

It is an arithmetic number, because the mean of its divisors is an integer number (3837120).

Almost surely, 2^40145031 is an apocalyptic number.

40145031 is a deficient number, since it is larger than the sum of its proper divisors (21248889).

40145031 is a wasteful number, since it uses less digits than its factorization.

40145031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48003 (or 47997 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40145031 is about 6336.0106534001. The cubic root of 40145031 is about 342.4080233248.

Adding to 40145031 its reverse (13054104), we get a palindrome (53199135).

It can be divided in two parts, 4014 and 5031, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 40145031 in words is "forty million, one hundred forty-five thousand, thirty-one".