31030942 has 4 divisors (see below), whose sum is σ = 46546416. Its totient is φ = 15515470.

The previous prime is 31030939. The next prime is 31030943. The reversal of 31030942 is 24903013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24903013 = 31 ⋅803323.

It is a super-2 number, since 2×31030942² = 1925838722814728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31030943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7757734 + ... + 7757737.

It is an arithmetic number, because the mean of its divisors is an integer number (11636604).

Almost surely, 2^31030942 is an apocalyptic number.

31030942 is a deficient number, since it is larger than the sum of its proper divisors (15515474).

31030942 is a wasteful number, since it uses less digits than its factorization.

31030942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15515473.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 31030942 is about 5570.5423434348. The cubic root of 31030942 is about 314.2425472590.

Adding to 31030942 its reverse (24903013), we get a palindrome (55933955).

The spelling of 31030942 in words is "thirty-one million, thirty thousand, nine hundred forty-two".