31135042 has 4 divisors (see below), whose sum is σ = 46702566. Its totient is φ = 15567520.

The previous prime is 31135001. The next prime is 31135051. The reversal of 31135042 is 24053113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31125241 + 9801 = 5579^2 + 99^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7783759 + ... + 7783762.

Almost surely, 2^31135042 is an apocalyptic number.

31135042 is a deficient number, since it is larger than the sum of its proper divisors (15567524).

31135042 is a wasteful number, since it uses less digits than its factorization.

31135042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15567523.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31135042 is about 5579.8783140854. The cubic root of 31135042 is about 314.5935532178.

Adding to 31135042 its reverse (24053113), we get a palindrome (55188155).

It can be divided in two parts, 311 and 35042, that added together give a palindrome (35353).

The spelling of 31135042 in words is "thirty-one million, one hundred thirty-five thousand, forty-two".