51107591 has 2 divisors, whose sum is σ = 51107592. Its totient is φ = 51107590.

The previous prime is 51107557. The next prime is 51107597. The reversal of 51107591 is 19570115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51107591 - 2¹⁸ = 50845447 is a prime.

It is a super-2 number, since 2×51107591² = 5223971715646562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51107597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25553795 + 25553796.

It is an arithmetic number, because the mean of its divisors is an integer number (25553796).

Almost surely, 2^51107591 is an apocalyptic number.

51107591 is a deficient number, since it is larger than the sum of its proper divisors (1).

51107591 is an equidigital number, since it uses as much as digits as its factorization.

51107591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1575, while the sum is 29.

The square root of 51107591 is about 7148.9573365631. The cubic root of 51107591 is about 371.1035739329.

The spelling of 51107591 in words is "fifty-one million, one hundred seven thousand, five hundred ninety-one".