331988047 has 4 divisors (see below), whose sum is σ = 337430536. Its totient is φ = 326545560.

The previous prime is 331988009. The next prime is 331988057. The reversal of 331988047 is 740889133.

It is a happy number.

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 331988047 - 2¹¹ = 331985999 is a prime.

It is a super-2 number, since 2×331988047² = 220432126701748418, 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 = 331987994 and 331988012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331988057) 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 3 ways as a sum of consecutive naturals, for example, 2721153 + ... + 2721274.

It is an arithmetic number, because the mean of its divisors is an integer number (84357634).

Almost surely, 2^331988047 is an apocalyptic number.

331988047 is a deficient number, since it is larger than the sum of its proper divisors (5442489).

331988047 is an equidigital number, since it uses as much as digits as its factorization.

331988047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5442488.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 331988047 is about 18220.5391522864. The cubic root of 331988047 is about 692.4272472411.

The spelling of 331988047 in words is "three hundred thirty-one million, nine hundred eighty-eight thousand, forty-seven".