31311434 has 16 divisors (see below), whose sum is σ = 58556736. Its totient is φ = 12199200.

The previous prime is 31311431. The next prime is 31311437. The reversal of 31311434 is 43411313.

It is an interprime number because it is at equal distance from previous prime (31311431) and next prime (31311437).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31311431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101507 + ... + 101814.

It is an arithmetic number, because the mean of its divisors is an integer number (3659796).

Almost surely, 2^31311434 is an apocalyptic number.

31311434 is a deficient number, since it is larger than the sum of its proper divisors (27245302).

31311434 is a wasteful number, since it uses less digits than its factorization.

31311434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203341.

The product of its digits is 432, while the sum is 20.

The square root of 31311434 is about 5595.6620698538. The cubic root of 31311434 is about 315.1865326708.

Adding to 31311434 its reverse (43411313), we get a palindrome (74722747).

The spelling of 31311434 in words is "thirty-one million, three hundred eleven thousand, four hundred thirty-four".