5122531981 has 6 divisors (see below), whose sum is σ = 5958863790. Its totient is φ = 4390741656.

The previous prime is 5122531979. The next prime is 5122532011. The reversal of 5122531981 is 1891352215.

It can be written as a sum of positive squares in only one way, i.e., 3305215081 + 1817316900 = 57491^2 + 42630^2 .

It is not a de Polignac number, because 5122531981 - 2¹ = 5122531979 is a prime.

It is a super-2 number, since 2×5122531981² = 52480667792735568722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5122531981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5122531961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52270686 + ... + 52270783.

It is an arithmetic number, because the mean of its divisors is an integer number (993143965).

Almost surely, 2^5122531981 is an apocalyptic number.

It is an amenable number.

5122531981 is a deficient number, since it is larger than the sum of its proper divisors (836331809).

5122531981 is a wasteful number, since it uses less digits than its factorization.

5122531981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104541483 (or 104541476 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The square root of 5122531981 is about 71571.8658482507. The cubic root of 5122531981 is about 1723.8318191471.

The spelling of 5122531981 in words is "five billion, one hundred twenty-two million, five hundred thirty-one thousand, nine hundred eighty-one".