31126442 has 8 divisors (see below), whose sum is σ = 46723332. Its totient is φ = 15552000.

The previous prime is 31126441. The next prime is 31126457. The reversal of 31126442 is 24462113.

It can be written as a sum of positive squares in 2 ways, for example, as 28633201 + 2493241 = 5351^2 + 1579^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31126441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559 + ... + 8042.

Almost surely, 2^31126442 is an apocalyptic number.

31126442 is a deficient number, since it is larger than the sum of its proper divisors (15596890).

31126442 is a wasteful number, since it uses less digits than its factorization.

31126442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11224.

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

The square root of 31126442 is about 5579.1076347387. The cubic root of 31126442 is about 314.5645852819.

Adding to 31126442 its reverse (24462113), we get a palindrome (55588555).

The spelling of 31126442 in words is "thirty-one million, one hundred twenty-six thousand, four hundred forty-two".