4001020031 has 8 divisors (see below), whose sum is σ = 4016145744. Its totient is φ = 3985914240.

The previous prime is 4001019983. The next prime is 4001020087. The reversal of 4001020031 is 1300201004.

It is a happy number.

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 4001020031 - 2²² = 3996825727 is a prime.

It is a super-2 number, since 2×4001020031² = 32016322576926481922, 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 = 4001019994 and 4001020021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001020531) 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, 485576 + ... + 493746.

It is an arithmetic number, because the mean of its divisors is an integer number (502018218).

Almost surely, 2^4001020031 is an apocalyptic number.

4001020031 is a deficient number, since it is larger than the sum of its proper divisors (15125713).

4001020031 is a wasteful number, since it uses less digits than its factorization.

4001020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 4001020031 is about 63253.6167424441. The cubic root of 4001020031 is about 1587.5359736904.

Adding to 4001020031 its reverse (1300201004), we get a palindrome (5301221035).

The spelling of 4001020031 in words is "four billion, one million, twenty thousand, thirty-one".