31012442 has 4 divisors (see below), whose sum is σ = 46518666. Its totient is φ = 15506220.

The previous prime is 31012439. The next prime is 31012451. The reversal of 31012442 is 24421013.

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., 23222761 + 7789681 = 4819^2 + 2791^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31012442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7753109 + ... + 7753112.

Almost surely, 2^31012442 is an apocalyptic number.

31012442 is a deficient number, since it is larger than the sum of its proper divisors (15506224).

31012442 is a wasteful number, since it uses less digits than its factorization.

31012442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15506223.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31012442 is about 5568.8815753255. The cubic root of 31012442 is about 314.1800865620.

Adding to 31012442 its reverse (24421013), we get a palindrome (55433455).

The spelling of 31012442 in words is "thirty-one million, twelve thousand, four hundred forty-two".