3200400031 has 4 divisors (see below), whose sum is σ = 3211323192. Its totient is φ = 3189476872.

The previous prime is 3200400023. The next prime is 3200400037. The reversal of 3200400031 is 1300040023.

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

It is a cyclic number.

It is not a de Polignac number, because 3200400031 - 2³ = 3200400023 is a prime.

It is a super-2 number, since 2×3200400031² = 20485120716849601922, 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 = 3200399984 and 3200400020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3200400037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5461141 + ... + 5461726.

It is an arithmetic number, because the mean of its divisors is an integer number (802830798).

Almost surely, 2^3200400031 is an apocalyptic number.

3200400031 is a deficient number, since it is larger than the sum of its proper divisors (10923161).

3200400031 is a wasteful number, since it uses less digits than its factorization.

3200400031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10923160.

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

The square root of 3200400031 is about 56572.0781923380. The cubic root of 3200400031 is about 1473.6740021811.

Adding to 3200400031 its reverse (1300040023), we get a palindrome (4500440054).

The spelling of 3200400031 in words is "three billion, two hundred million, four hundred thousand, thirty-one".