40302031 has 8 divisors (see below), whose sum is σ = 50246784. Its totient is φ = 31404120.

The previous prime is 40302023. The next prime is 40302037. The reversal of 40302031 is 13020304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40302031 - 2³ = 40302023 is a prime.

It is a super-2 number, since 2×40302031² = 3248507405449922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40302037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261625 + ... + 261778.

It is an arithmetic number, because the mean of its divisors is an integer number (6280848).

Almost surely, 2^40302031 is an apocalyptic number.

40302031 is a deficient number, since it is larger than the sum of its proper divisors (9944753).

40302031 is a wasteful number, since it uses less digits than its factorization.

40302031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523421.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 40302031 is about 6348.3880631228. The cubic root of 40302031 is about 342.8538081108.

Adding to 40302031 its reverse (13020304), we get a palindrome (53322335).

The spelling of 40302031 in words is "forty million, three hundred two thousand, thirty-one".