31011033204 has 18 divisors (see below), whose sum is σ = 78389000690. Its totient is φ = 10337011056.

The previous prime is 31011033169. The next prime is 31011033253. The reversal of 31011033204 is 40233011013.

It can be written as a sum of positive squares in only one way, i.e., 20292572304 + 10718460900 = 142452^2 + 103530^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 430708759 + ... + 430708830.

Almost surely, 2^31011033204 is an apocalyptic number.

It is an amenable number.

31011033204 is an abundant number, since it is smaller than the sum of its proper divisors (47377967486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31011033204 is a wasteful number, since it uses less digits than its factorization.

31011033204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861417599 (or 861417594 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31011033204 its reverse (40233011013), we get a palindrome (71244044217).

The spelling of 31011033204 in words is "thirty-one billion, eleven million, thirty-three thousand, two hundred four".