31530046 has 8 divisors (see below), whose sum is σ = 48070584. Its totient is φ = 15506520.

The previous prime is 31530043. The next prime is 31530061. The reversal of 31530046 is 64003513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31529999 and 31530026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31530043) 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 in 3 ways as a sum of consecutive naturals, for example, 129100 + ... + 129343.

It is an arithmetic number, because the mean of its divisors is an integer number (6008823).

Almost surely, 2^31530046 is an apocalyptic number.

31530046 is a deficient number, since it is larger than the sum of its proper divisors (16540538).

31530046 is a wasteful number, since it uses less digits than its factorization.

31530046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258506.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 31530046 is about 5615.1621526008. The cubic root of 31530046 is about 315.9183613812.

Adding to 31530046 its reverse (64003513), we get a palindrome (95533559).

The spelling of 31530046 in words is "thirty-one million, five hundred thirty thousand, forty-six".