331481436 has 144 divisors (see below), whose sum is σ = 970355232. Its totient is φ = 87183360.

The previous prime is 331481431. The next prime is 331481443. The reversal of 331481436 is 634184133.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 331481397 and 331481406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331481431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 320376 + ... + 321408.

It is an arithmetic number, because the mean of its divisors is an integer number (6738578).

Almost surely, 2^331481436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331481436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485177616).

331481436 is an abundant number, since it is smaller than the sum of its proper divisors (638873796).

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

331481436 is a wasteful number, since it uses less digits than its factorization.

331481436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1079 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 331481436 is about 18206.6316489350. The cubic root of 331481436 is about 692.0748551900.

The spelling of 331481436 in words is "three hundred thirty-one million, four hundred eighty-one thousand, four hundred thirty-six".