5113661521 has 2 divisors, whose sum is σ = 5113661522. Its totient is φ = 5113661520.

The previous prime is 5113661467. The next prime is 5113661533. The reversal of 5113661521 is 1251663115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2794179600 + 2319481921 = 52860^2 + 48161^2 .

It is a cyclic number.

It is not a de Polignac number, because 5113661521 - 2¹⁵ = 5113628753 is a prime.

It is a super-2 number, since 2×5113661521² = 52299068302712066882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5113661551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2556830760 + 2556830761.

It is an arithmetic number, because the mean of its divisors is an integer number (2556830761).

Almost surely, 2^5113661521 is an apocalyptic number.

It is an amenable number.

5113661521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5113661521 is an equidigital number, since it uses as much as digits as its factorization.

5113661521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 5113661521 is about 71509.8700949736. The cubic root of 5113661521 is about 1722.8362167049.

The spelling of 5113661521 in words is "five billion, one hundred thirteen million, six hundred sixty-one thousand, five hundred twenty-one".