31030443242 has 4 divisors (see below), whose sum is σ = 46545664866. Its totient is φ = 15515221620.

The previous prime is 31030443221. The next prime is 31030443293. The reversal of 31030443242 is 24234403013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 29780750041 + 1249693201 = 172571^2 + 35351^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7757610809 + ... + 7757610812.

Almost surely, 2^31030443242 is an apocalyptic number.

31030443242 is a deficient number, since it is larger than the sum of its proper divisors (15515221624).

31030443242 is a wasteful number, since it uses less digits than its factorization.

31030443242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15515221623.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 31030443242 its reverse (24234403013), we get a palindrome (55264846255).

The spelling of 31030443242 in words is "thirty-one billion, thirty million, four hundred forty-three thousand, two hundred forty-two".