31212214442 has 8 divisors (see below), whose sum is σ = 46819089156. Its totient is φ = 15605851392.

The previous prime is 31212214417. The next prime is 31212214447. The reversal of 31212214442 is 24441221213.

It can be written as a sum of positive squares in 2 ways, for example, as 23672591881 + 7539622561 = 153859^2 + 86831^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31212214447) 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, 123128 + ... + 278540.

Almost surely, 2^31212214442 is an apocalyptic number.

31212214442 is a deficient number, since it is larger than the sum of its proper divisors (15606874714).

31212214442 is a wasteful number, since it uses less digits than its factorization.

31212214442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255832.

The product of its digits is 3072, while the sum is 26.

Adding to 31212214442 its reverse (24441221213), we get a palindrome (55653435655).

The spelling of 31212214442 in words is "thirty-one billion, two hundred twelve million, two hundred fourteen thousand, four hundred forty-two".