331142631 has 8 divisors (see below), whose sum is σ = 445810560. Its totient is φ = 218618232.

The previous prime is 331142611. The next prime is 331142639. The reversal of 331142631 is 136241133.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331142631 - 2⁵ = 331142599 is a prime.

It is a super-2 number, since 2×331142631² = 219310884131204322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331142639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535521 + ... + 536138.

It is an arithmetic number, because the mean of its divisors is an integer number (55726320).

Almost surely, 2^331142631 is an apocalyptic number.

331142631 is a deficient number, since it is larger than the sum of its proper divisors (114667929).

331142631 is a wasteful number, since it uses less digits than its factorization.

331142631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071765.

The product of its digits is 1296, while the sum is 24.

The square root of 331142631 is about 18197.3248308646. The cubic root of 331142631 is about 691.8389864228.

Adding to 331142631 its reverse (136241133), we get a palindrome (467383764).

The spelling of 331142631 in words is "three hundred thirty-one million, one hundred forty-two thousand, six hundred thirty-one".