31984401 has 4 divisors (see below), whose sum is σ = 42645872. Its totient is φ = 21322932.

The previous prime is 31984397. The next prime is 31984409. The reversal of 31984401 is 10448913.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10448913 = 3 ⋅3482971.

It is not a de Polignac number, because 31984401 - 2² = 31984397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31984409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330731 + ... + 5330736.

It is an arithmetic number, because the mean of its divisors is an integer number (10661468).

Almost surely, 2^31984401 is an apocalyptic number.

It is an amenable number.

31984401 is a deficient number, since it is larger than the sum of its proper divisors (10661471).

31984401 is a wasteful number, since it uses less digits than its factorization.

31984401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661470.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 31984401 is about 5655.4753115896. The cubic root of 31984401 is about 317.4286147819.

It can be divided in two parts, 31984 and 401, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 31984401 in words is "thirty-one million, nine hundred eighty-four thousand, four hundred one".