31243402 has 8 divisors (see below), whose sum is σ = 47320416. Its totient is φ = 15469932.

The previous prime is 31243393. The next prime is 31243417. The reversal of 31243402 is 20434213.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31243402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75628 + ... + 76039.

It is an arithmetic number, because the mean of its divisors is an integer number (5915052).

Almost surely, 2^31243402 is an apocalyptic number.

31243402 is a deficient number, since it is larger than the sum of its proper divisors (16077014).

31243402 is a wasteful number, since it uses less digits than its factorization.

31243402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151772.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 31243402 is about 5589.5797695355. The cubic root of 31243402 is about 314.9580930225.

Adding to 31243402 its reverse (20434213), we get a palindrome (51677615).

The spelling of 31243402 in words is "thirty-one million, two hundred forty-three thousand, four hundred two".