331400242 has 32 divisors (see below), whose sum is σ = 533433600. Its totient is φ = 153958608.

The previous prime is 331400213. The next prime is 331400249. The reversal of 331400242 is 242004133.

It is a super-2 number, since 2×331400242² = 219652240795317128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (331400249) 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 15 ways as a sum of consecutive naturals, for example, 564273 + ... + 564859.

It is an arithmetic number, because the mean of its divisors is an integer number (16669800).

Almost surely, 2^331400242 is an apocalyptic number.

331400242 is a deficient number, since it is larger than the sum of its proper divisors (202033358).

331400242 is a wasteful number, since it uses less digits than its factorization.

331400242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 331400242 is about 18204.4017204631. The cubic root of 331400242 is about 692.0183443186.

Adding to 331400242 its reverse (242004133), we get a palindrome (573404375).

The spelling of 331400242 in words is "three hundred thirty-one million, four hundred thousand, two hundred forty-two".