31423202 has 4 divisors (see below), whose sum is σ = 47134806. Its totient is φ = 15711600.

The previous prime is 31423187. The next prime is 31423237. The reversal of 31423202 is 20232413.

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., 28955161 + 2468041 = 5381^2 + 1571^2 .

It is an unprimeable number.

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, 7855799 + ... + 7855802.

Almost surely, 2^31423202 is an apocalyptic number.

31423202 is a deficient number, since it is larger than the sum of its proper divisors (15711604).

31423202 is a wasteful number, since it uses less digits than its factorization.

31423202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15711603.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31423202 is about 5605.6401953747. The cubic root of 31423202 is about 315.5611129327.

Adding to 31423202 its reverse (20232413), we get a palindrome (51655615).

The spelling of 31423202 in words is "thirty-one million, four hundred twenty-three thousand, two hundred two".