31043430 has 48 divisors (see below), whose sum is σ = 88053264. Its totient is φ = 7525440.

The previous prime is 31043417. The next prime is 31043443. The reversal of 31043430 is 3434013.

It is an interprime number because it is at equal distance from previous prime (31043417) and next prime (31043443).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14689 + ... + 16668.

It is an arithmetic number, because the mean of its divisors is an integer number (1834443).

Almost surely, 2^31043430 is an apocalyptic number.

31043430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31043430 is an abundant number, since it is smaller than the sum of its proper divisors (57009834).

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

31043430 is a wasteful number, since it uses less digits than its factorization.

31043430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31381 (or 31378 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31043430 is about 5571.6631269308. The cubic root of 31043430 is about 314.2846958841.

Adding to 31043430 its reverse (3434013), we get a palindrome (34477443).

The spelling of 31043430 in words is "thirty-one million, forty-three thousand, four hundred thirty".