51509119 has 2 divisors, whose sum is σ = 51509120. Its totient is φ = 51509118.

The previous prime is 51509093. The next prime is 51509137. The reversal of 51509119 is 91190515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51509119 - 2⁷ = 51508991 is a prime.

It is a super-2 number, since 2×51509119² = 5306378680312322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51509819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25754559 + 25754560.

It is an arithmetic number, because the mean of its divisors is an integer number (25754560).

Almost surely, 2^51509119 is an apocalyptic number.

51509119 is a deficient number, since it is larger than the sum of its proper divisors (1).

51509119 is an equidigital number, since it uses as much as digits as its factorization.

51509119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025, while the sum is 31.

The square root of 51509119 is about 7176.9853699168. The cubic root of 51509119 is about 372.0729011748.

The spelling of 51509119 in words is "fifty-one million, five hundred nine thousand, one hundred nineteen".