31400248442 has 8 divisors (see below), whose sum is σ = 47101124532. Its totient is φ = 15699873600.

The previous prime is 31400248433. The next prime is 31400248457. The reversal of 31400248442 is 24484200413.

It can be written as a sum of positive squares in 2 ways, for example, as 30969312361 + 430936081 = 175981^2 + 20759^2 .

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 = 31400248399 and 31400248408.

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, 183842 + ... + 310802.

Almost surely, 2^31400248442 is an apocalyptic number.

31400248442 is a deficient number, since it is larger than the sum of its proper divisors (15700876090).

31400248442 is a wasteful number, since it uses less digits than its factorization.

31400248442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250624.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 31400248442 its reverse (24484200413), we get a palindrome (55884448855).

The spelling of 31400248442 in words is "thirty-one billion, four hundred million, two hundred forty-eight thousand, four hundred forty-two".