331909946 has 8 divisors (see below), whose sum is σ = 498022644. Its totient is φ = 165902400.

The previous prime is 331909933. The next prime is 331909969. The reversal of 331909946 is 649909133.

It can be written as a sum of positive squares in 2 ways, for example, as 329821921 + 2088025 = 18161^2 + 1445^2 .

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

It is a super-2 number, since 2×331909946² = 220328424507445832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331909897 and 331909906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17855 + ... + 31346.

Almost surely, 2^331909946 is an apocalyptic number.

331909946 is a deficient number, since it is larger than the sum of its proper divisors (166112698).

331909946 is a wasteful number, since it uses less digits than its factorization.

331909946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52576.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 331909946 is about 18218.3958130237. The cubic root of 331909946 is about 692.3729445814.

The spelling of 331909946 in words is "three hundred thirty-one million, nine hundred nine thousand, nine hundred forty-six".