40851731 has 8 divisors (see below), whose sum is σ = 43482384. Its totient is φ = 38246400.

The previous prime is 40851721. The next prime is 40851743. The reversal of 40851731 is 13715804.

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

It is a cyclic number.

It is not a de Polignac number, because 40851731 - 2⁶ = 40851667 is a prime.

It is a super-2 number, since 2×40851731² = 3337727851392722, 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 = 40851694 and 40851703.

It is not an unprimeable number, because it can be changed into a prime (40851721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2945 + ... + 9506.

It is an arithmetic number, because the mean of its divisors is an integer number (5435298).

Almost surely, 2^40851731 is an apocalyptic number.

40851731 is a deficient number, since it is larger than the sum of its proper divisors (2630653).

40851731 is a wasteful number, since it uses less digits than its factorization.

40851731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12661.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 40851731 is about 6391.5358874061. The cubic root of 40851731 is about 344.4055604119.

The spelling of 40851731 in words is "forty million, eight hundred fifty-one thousand, seven hundred thirty-one".