31331434 has 16 divisors (see below), whose sum is σ = 48454560. Its totient is φ = 15185520.

The previous prime is 31331431. The next prime is 31331441. The reversal of 31331434 is 43413313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31331431) 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 7 ways as a sum of consecutive naturals, for example, 10644 + ... + 13264.

It is an arithmetic number, because the mean of its divisors is an integer number (3028410).

Almost surely, 2^31331434 is an apocalyptic number.

31331434 is a deficient number, since it is larger than the sum of its proper divisors (17123126).

31331434 is a wasteful number, since it uses less digits than its factorization.

31331434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805.

The product of its digits is 1296, while the sum is 22.

The square root of 31331434 is about 5597.4488831967. The cubic root of 31331434 is about 315.2536262547.

Adding to 31331434 its reverse (43413313), we get a palindrome (74744747).

The spelling of 31331434 in words is "thirty-one million, three hundred thirty-one thousand, four hundred thirty-four".