51135563 has 2 divisors, whose sum is σ = 51135564. Its totient is φ = 51135562.

The previous prime is 51135529. The next prime is 51135589. The reversal of 51135563 is 36553115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51135563 - 2⁶ = 51135499 is a prime.

It is a super-2 number, since 2×51135563² = 5229691606653938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51135863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25567781 + 25567782.

It is an arithmetic number, because the mean of its divisors is an integer number (25567782).

Almost surely, 2^51135563 is an apocalyptic number.

51135563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51135563 is an equidigital number, since it uses as much as digits as its factorization.

51135563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6750, while the sum is 29.

The square root of 51135563 is about 7150.9134381560. The cubic root of 51135563 is about 371.1712652207.

Adding to 51135563 its reverse (36553115), we get a palindrome (87688678).

The spelling of 51135563 in words is "fifty-one million, one hundred thirty-five thousand, five hundred sixty-three".