31103131001030 has 48 divisors (see below), whose sum is σ = 63201117656880. Its totient is φ = 11004547561920.

The previous prime is 31103131001011. The next prime is 31103131001039. The reversal of 31103131001030 is 3010013130113.

It is a super-2 number, since 2×31103131001030² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103131001039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347321000 + ... + 347410539.

It is an arithmetic number, because the mean of its divisors is an integer number (1316689951185).

Almost surely, 2^{31103131001030} is an apocalyptic number.

31103131001030 is an abundant number, since it is smaller than the sum of its proper divisors (32097986655850).

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

31103131001030 is a wasteful number, since it uses less digits than its factorization.

31103131001030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694731605 (or 694731594 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 17.

Adding to 31103131001030 its reverse (3010013130113), we get a palindrome (34113144131143).

The spelling of 31103131001030 in words is "thirty-one trillion, one hundred three billion, one hundred thirty-one million, one thousand, thirty".