31045442 has 16 divisors (see below), whose sum is σ = 48029112. Its totient is φ = 15039360.

The previous prime is 31045429. The next prime is 31045447. The reversal of 31045442 is 24454013.

It can be written as a sum of positive squares in 4 ways, for example, as 30481441 + 564001 = 5521^2 + 751^2 .

It is not an unprimeable number, because it can be changed into a prime (31045447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20048 + ... + 21540.

Almost surely, 2^31045442 is an apocalyptic number.

31045442 is a deficient number, since it is larger than the sum of its proper divisors (16983670).

31045442 is a wasteful number, since it uses less digits than its factorization.

31045442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 31045442 is about 5571.8436805065. The cubic root of 31045442 is about 314.2914855886.

Adding to 31045442 its reverse (24454013), we get a palindrome (55499455).

The spelling of 31045442 in words is "thirty-one million, forty-five thousand, four hundred forty-two".