31030369981081 has 3 divisors (see below), whose sum is σ = 31030375551573. Its totient is φ = 31030364410590.

The previous prime is 31030369981067. The next prime is 31030369981087. The reversal of 31030369981081 is 18018996303013.

It is a happy number.

The square root of 31030369981081 is 5570491.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 31030369981081 - 2²³ = 31030361592473 is a prime.

It is a super-2 number, since 2×31030369981081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31030369981087) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2785246 + ... + 8355736.

It is an arithmetic number, because the mean of its divisors is an integer number (10343458517191).

Almost surely, 2^{31030369981081} is an apocalyptic number.

31030369981081 is the 5570491-st square number.

31030369981081 is the 2785246-th centered octagonal number.

It is an amenable number.

31030369981081 is a deficient number, since it is larger than the sum of its proper divisors (5570492).

31030369981081 is an frugal number, since it uses more digits than its factorization.

31030369981081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11140982 (or 5570491 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 31030369981081 in words is "thirty-one trillion, thirty billion, three hundred sixty-nine million, nine hundred eighty-one thousand, eighty-one".