3131221442 has 8 divisors (see below), whose sum is σ = 4709226000. Its totient is φ = 1561479444.

The previous prime is 3131221427. The next prime is 3131221469. The reversal of 3131221442 is 2441221313.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2064692 + ... + 2066207.

It is an arithmetic number, because the mean of its divisors is an integer number (588653250).

Almost surely, 2^3131221442 is an apocalyptic number.

3131221442 is a deficient number, since it is larger than the sum of its proper divisors (1578004558).

3131221442 is a wasteful number, since it uses less digits than its factorization.

3131221442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4131280.

The product of its digits is 1152, while the sum is 23.

The square root of 3131221442 is about 55957.3180379475. The cubic root of 3131221442 is about 1462.9784449879.

Adding to 3131221442 its reverse (2441221313), we get a palindrome (5572442755).

The spelling of 3131221442 in words is "three billion, one hundred thirty-one million, two hundred twenty-one thousand, four hundred forty-two".