31113021194 has 4 divisors (see below), whose sum is σ = 46669531794. Its totient is φ = 15556510596.

The previous prime is 31113021187. The next prime is 31113021197. The reversal of 31113021194 is 49112031113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49112031113 = 59 ⋅832407307.

It can be written as a sum of positive squares in only one way, i.e., 24578400625 + 6534620569 = 156775^2 + 80837^2 .

It is not an unprimeable number, because it can be changed into a prime (31113021197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7778255297 + ... + 7778255300.

Almost surely, 2^31113021194 is an apocalyptic number.

31113021194 is a deficient number, since it is larger than the sum of its proper divisors (15556510600).

31113021194 is a wasteful number, since it uses less digits than its factorization.

31113021194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15556510599.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 31113021194 in words is "thirty-one billion, one hundred thirteen million, twenty-one thousand, one hundred ninety-four".