31145434 has 8 divisors (see below), whose sum is σ = 47309760. Its totient is φ = 15375516.

The previous prime is 31145431. The next prime is 31145437. The reversal of 31145434 is 43454113.

It is an interprime number because it is at equal distance from previous prime (31145431) and next prime (31145437).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31145399 and 31145408.

It is not an unprimeable number, because it can be changed into a prime (31145431) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 98404 + ... + 98719.

It is an arithmetic number, because the mean of its divisors is an integer number (5913720).

Almost surely, 2^31145434 is an apocalyptic number.

31145434 is a deficient number, since it is larger than the sum of its proper divisors (16164326).

31145434 is a wasteful number, since it uses less digits than its factorization.

31145434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197204.

The product of its digits is 2880, while the sum is 25.

The square root of 31145434 is about 5580.8094394989. The cubic root of 31145434 is about 314.6285501466.

Adding to 31145434 its reverse (43454113), we get a palindrome (74599547).

The spelling of 31145434 in words is "thirty-one million, one hundred forty-five thousand, four hundred thirty-four".