331442432 has 36 divisors (see below), whose sum is σ = 664187580. Its totient is φ = 165070848.

The previous prime is 331442431. The next prime is 331442437. The reversal of 331442432 is 234244133.

It can be written as a sum of positive squares in 2 ways, for example, as 122235136 + 209207296 = 11056^2 + 14464^2 .

It is not an unprimeable number, because it can be changed into a prime (331442431) 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, 66458 + ... + 71270.

It is an arithmetic number, because the mean of its divisors is an integer number (18449655).

Almost surely, 2^331442432 is an apocalyptic number.

331442432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332093790).

331442432 is an abundant number, since it is smaller than the sum of its proper divisors (332745148).

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

331442432 is an equidigital number, since it uses as much as digits as its factorization.

331442432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5098 (or 5084 counting only the distinct ones).

The product of its digits is 6912, while the sum is 26.

The square root of 331442432 is about 18205.5604692632. The cubic root of 331442432 is about 692.0477096312.

Adding to 331442432 its reverse (234244133), we get a palindrome (565686565).

The spelling of 331442432 in words is "three hundred thirty-one million, four hundred forty-two thousand, four hundred thirty-two".