31142346 has 32 divisors (see below), whose sum is σ = 65188800. Its totient is φ = 9905280.

The previous prime is 31142303. The next prime is 31142381. The reversal of 31142346 is 64324113.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14481 + ... + 16491.

It is an arithmetic number, because the mean of its divisors is an integer number (2037150).

Almost surely, 2^31142346 is an apocalyptic number.

31142346 is an abundant number, since it is smaller than the sum of its proper divisors (34046454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31142346 is a wasteful number, since it uses less digits than its factorization.

31142346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134.

The product of its digits is 1728, while the sum is 24.

The square root of 31142346 is about 5580.5327702649. The cubic root of 31142346 is about 314.6181515643.

Adding to 31142346 its reverse (64324113), we get a palindrome (95466459).

It can be divided in two parts, 3114 and 2346, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 31142346 in words is "thirty-one million, one hundred forty-two thousand, three hundred forty-six".