331620042 has 32 divisors (see below), whose sum is σ = 730876608. Its totient is φ = 99662976.

The previous prime is 331620019. The next prime is 331620043. The reversal of 331620042 is 240026133.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (331620043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46083 + ... + 52790.

It is an arithmetic number, because the mean of its divisors is an integer number (22839894).

Almost surely, 2^331620042 is an apocalyptic number.

331620042 is an abundant number, since it is smaller than the sum of its proper divisors (399256566).

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

331620042 is a wasteful number, since it uses less digits than its factorization.

331620042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98934.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 331620042 is about 18210.4377212630. The cubic root of 331620042 is about 692.1713033868.

Adding to 331620042 its reverse (240026133), we get a palindrome (571646175).

The spelling of 331620042 in words is "three hundred thirty-one million, six hundred twenty thousand, forty-two".