331421647 has 8 divisors (see below), whose sum is σ = 351212112. Its totient is φ = 311664000.

The previous prime is 331421633. The next prime is 331421663. The reversal of 331421647 is 746124133.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331421647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331421627) 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, 14397 + ... + 29497.

It is an arithmetic number, because the mean of its divisors is an integer number (43901514).

Almost surely, 2^331421647 is an apocalyptic number.

331421647 is a deficient number, since it is larger than the sum of its proper divisors (19790465).

331421647 is a wasteful number, since it uses less digits than its factorization.

331421647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16409.

The product of its digits is 12096, while the sum is 31.

The square root of 331421647 is about 18204.9896182338. The cubic root of 331421647 is about 692.0332430542.

The spelling of 331421647 in words is "three hundred thirty-one million, four hundred twenty-one thousand, six hundred forty-seven".