331261542 has 48 divisors (see below), whose sum is σ = 776965680. Its totient is φ = 104602752.

The previous prime is 331261529. The next prime is 331261543. The reversal of 331261542 is 245162133.

331261542 is a `hidden beast` number, since 3 + 3 + 1 + 2 + 615 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331261543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10998 + ... + 27990.

It is an arithmetic number, because the mean of its divisors is an integer number (16186785).

Almost surely, 2^331261542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331261542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388482840).

331261542 is an abundant number, since it is smaller than the sum of its proper divisors (445704138).

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

331261542 is a wasteful number, since it uses less digits than its factorization.

331261542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17042 (or 17017 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 331261542 is about 18200.5918035651. The cubic root of 331261542 is about 691.9217880243.

The spelling of 331261542 in words is "three hundred thirty-one million, two hundred sixty-one thousand, five hundred forty-two".