31012042 has 4 divisors (see below), whose sum is σ = 46518066. Its totient is φ = 15506020.

The previous prime is 31012039. The next prime is 31012043. The reversal of 31012042 is 24021013.

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., 30902481 + 109561 = 5559^2 + 331^2 .

It is not an unprimeable number, because it can be changed into a prime (31012043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7753009 + ... + 7753012.

Almost surely, 2^31012042 is an apocalyptic number.

31012042 is a deficient number, since it is larger than the sum of its proper divisors (15506024).

31012042 is a wasteful number, since it uses less digits than its factorization.

31012042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15506023.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31012042 is about 5568.8456613557. The cubic root of 31012042 is about 314.1787357861.

Adding to 31012042 its reverse (24021013), we get a palindrome (55033055).

The spelling of 31012042 in words is "thirty-one million, twelve thousand, forty-two".