51101087 has 2 divisors, whose sum is σ = 51101088. Its totient is φ = 51101086.

The previous prime is 51101023. The next prime is 51101131. The reversal of 51101087 is 78010115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51101087 - 2⁶ = 51101023 is a prime.

It is a super-2 number, since 2×51101087² = 5222642185163138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51101987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550543 + 25550544.

It is an arithmetic number, because the mean of its divisors is an integer number (25550544).

Almost surely, 2^51101087 is an apocalyptic number.

51101087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51101087 is an equidigital number, since it uses as much as digits as its factorization.

51101087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 51101087 is about 7148.5024305794. The cubic root of 51101087 is about 371.0878309354.

It can be divided in two parts, 5110108 and 7, that added together give a palindrome (5110115).

The spelling of 51101087 in words is "fifty-one million, one hundred one thousand, eighty-seven".