31255440442 has 8 divisors (see below), whose sum is σ = 47163898656. Its totient is φ = 15534140892.

The previous prime is 31255440427. The next prime is 31255440443. The reversal of 31255440442 is 24404455213.

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 = 31255440398 and 31255440407.

It is not an unprimeable number, because it can be changed into a prime (31255440443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46789248 + ... + 46789915.

It is an arithmetic number, because the mean of its divisors is an integer number (5895487332).

Almost surely, 2^31255440442 is an apocalyptic number.

31255440442 is a deficient number, since it is larger than the sum of its proper divisors (15908458214).

31255440442 is a wasteful number, since it uses less digits than its factorization.

31255440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93579332.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 31255440442 its reverse (24404455213), we get a palindrome (55659895655).

The spelling of 31255440442 in words is "thirty-one billion, two hundred fifty-five million, four hundred forty thousand, four hundred forty-two".