31243470 has 16 divisors (see below), whose sum is σ = 74984400. Its totient is φ = 8331584.

The previous prime is 31243463. The next prime is 31243493. The reversal of 31243470 is 7434213.

It is a self number, because there is not a number n which added to its sum of digits gives 31243470.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520695 + ... + 520754.

It is an arithmetic number, because the mean of its divisors is an integer number (4686525).

Almost surely, 2^31243470 is an apocalyptic number.

31243470 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31243470 is an abundant number, since it is smaller than the sum of its proper divisors (43740930).

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

31243470 is a wasteful number, since it uses less digits than its factorization.

31243470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041459.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 31243470 is about 5589.5858522792. The cubic root of 31243470 is about 314.9583215202.

Adding to 31243470 its reverse (7434213), we get a palindrome (38677683).

It can be divided in two parts, 31243 and 470, that added together give a palindrome (31713).

The spelling of 31243470 in words is "thirty-one million, two hundred forty-three thousand, four hundred seventy".