5515000031 has 2 divisors, whose sum is σ = 5515000032. Its totient is φ = 5515000030.

The previous prime is 5514999949. The next prime is 5515000063. The reversal of 5515000031 is 1300005155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5515000031 - 2¹⁸ = 5514737887 is a prime.

It is a super-2 number, since 2×5515000031² = 60830450683860001922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 5514999967 and 5515000012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5515000531) by changing a digit.

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 as a sum of consecutive naturals, namely, 2757500015 + 2757500016.

It is an arithmetic number, because the mean of its divisors is an integer number (2757500016).

Almost surely, 2^5515000031 is an apocalyptic number.

5515000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

5515000031 is an equidigital number, since it uses as much as digits as its factorization.

5515000031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 5515000031 is about 74263.0462006508. The cubic root of 5515000031 is about 1766.7774181469. Note that the first 3 decimals are identical.

Adding to 5515000031 its reverse (1300005155), we get a palindrome (6815005186).

The spelling of 5515000031 in words is "five billion, five hundred fifteen million, thirty-one", and thus it is an aban number.