81134051 has 2 divisors, whose sum is σ = 81134052. Its totient is φ = 81134050.

The previous prime is 81134033. The next prime is 81134057. The reversal of 81134051 is 15043118.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81134051 is a prime.

It is not a weakly prime, because it can be changed into another prime (81134057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40567025 + 40567026.

It is an arithmetic number, because the mean of its divisors is an integer number (40567026).

Almost surely, 2^81134051 is an apocalyptic number.

81134051 is a deficient number, since it is larger than the sum of its proper divisors (1).

81134051 is an equidigital number, since it uses as much as digits as its factorization.

81134051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 81134051 is about 9007.4441991055. Note that the first 3 decimals coincide. The cubic root of 81134051 is about 432.9134247241.

Adding to 81134051 its reverse (15043118), we get a palindrome (96177169).

The spelling of 81134051 in words is "eighty-one million, one hundred thirty-four thousand, fifty-one".