331342020 has 36 divisors (see below), whose sum is σ = 1005071340. Its totient is φ = 88357824.

The previous prime is 331342013. The next prime is 331342027. The reversal of 331342020 is 20243133.

It is an interprime number because it is at equal distance from previous prime (331342013) and next prime (331342027).

It can be written as a sum of positive squares in 2 ways, for example, as 212226624 + 119115396 = 14568^2 + 10914^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 331341984 and 331342002.

It is not an unprimeable number, because it can be changed into a prime (331342027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 920215 + ... + 920574.

Almost surely, 2^331342020 is an apocalyptic number.

331342020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331342020 is an abundant number, since it is smaller than the sum of its proper divisors (673729320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331342020 is a wasteful number, since it uses less digits than its factorization.

331342020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840804 (or 1840799 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 331342020 is about 18202.8025314785. The cubic root of 331342020 is about 691.9778162334.

Adding to 331342020 its reverse (20243133), we get a palindrome (351585153).

The spelling of 331342020 in words is "three hundred thirty-one million, three hundred forty-two thousand, twenty".