31870734573 has 4 divisors (see below), whose sum is σ = 42494312768. Its totient is φ = 21247156380.

The previous prime is 31870734569. The next prime is 31870734583. The reversal of 31870734573 is 37543707813.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37543707813 = 3 ⋅12514569271.

It is not a de Polignac number, because 31870734573 - 2² = 31870734569 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31870734583) 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, 5311789093 + ... + 5311789098.

It is an arithmetic number, because the mean of its divisors is an integer number (10623578192).

Almost surely, 2^31870734573 is an apocalyptic number.

It is an amenable number.

31870734573 is a deficient number, since it is larger than the sum of its proper divisors (10623578195).

31870734573 is a wasteful number, since it uses less digits than its factorization.

31870734573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10623578194.

The product of its (nonzero) digits is 1481760, while the sum is 48.

The spelling of 31870734573 in words is "thirty-one billion, eight hundred seventy million, seven hundred thirty-four thousand, five hundred seventy-three".