31553930 has 16 divisors (see below), whose sum is σ = 59266944. Its totient is φ = 12072720.

The previous prime is 31553903. The next prime is 31553983. The reversal of 31553930 is 3935513.

It is a junction number, because it is equal to n+sod(n) for n = 31553893 and 31553902.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68366 + ... + 68825.

It is an arithmetic number, because the mean of its divisors is an integer number (3704184).

Almost surely, 2^31553930 is an apocalyptic number.

31553930 is a deficient number, since it is larger than the sum of its proper divisors (27713014).

31553930 is a wasteful number, since it uses less digits than its factorization.

31553930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137221.

The product of its (nonzero) digits is 6075, while the sum is 29.

The square root of 31553930 is about 5617.2884917903. The cubic root of 31553930 is about 315.9981106013.

It can be divided in two parts, 315 and 53930, that added together give a palindrome (54245).

The spelling of 31553930 in words is "thirty-one million, five hundred fifty-three thousand, nine hundred thirty".