51113663 has 2 divisors, whose sum is σ = 51113664. Its totient is φ = 51113662.

The previous prime is 51113639. The next prime is 51113693. The reversal of 51113663 is 36631115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51113663 - 2⁶ = 51113599 is a prime.

It is a super-2 number, since 2×51113663² = 5225213090555138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51113603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556831 + 25556832.

It is an arithmetic number, because the mean of its divisors is an integer number (25556832).

Almost surely, 2^51113663 is an apocalyptic number.

51113663 is a deficient number, since it is larger than the sum of its proper divisors (1).

51113663 is an equidigital number, since it uses as much as digits as its factorization.

51113663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 51113663 is about 7149.3820012642. The cubic root of 51113663 is about 371.1182700647.

Adding to 51113663 its reverse (36631115), we get a palindrome (87744778).

The spelling of 51113663 in words is "fifty-one million, one hundred thirteen thousand, six hundred sixty-three".