5111011261 has 16 divisors (see below), whose sum is σ = 5435020800. Its totient is φ = 4798503360.

The previous prime is 5111011247. The next prime is 5111011271. The reversal of 5111011261 is 1621101115.

It is a cyclic number.

It is not a de Polignac number, because 5111011261 - 2⁷ = 5111011133 is a prime.

It is a super-2 number, since 2×5111011261² = 52244872220137620242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5111011271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185751 + ... + 211483.

It is an arithmetic number, because the mean of its divisors is an integer number (339688800).

Almost surely, 2^5111011261 is an apocalyptic number.

It is an amenable number.

5111011261 is a deficient number, since it is larger than the sum of its proper divisors (324009539).

5111011261 is a wasteful number, since it uses less digits than its factorization.

5111011261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25956.

The product of its (nonzero) digits is 60, while the sum is 19.

The square root of 5111011261 is about 71491.3369646980. The cubic root of 5111011261 is about 1722.5385335333.

Adding to 5111011261 its reverse (1621101115), we get a palindrome (6732112376).

The spelling of 5111011261 in words is "five billion, one hundred eleven million, eleven thousand, two hundred sixty-one".