51541691 has 2 divisors, whose sum is σ = 51541692. Its totient is φ = 51541690.

The previous prime is 51541663. The next prime is 51541709. The reversal of 51541691 is 19614515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51541691 - 2⁶ = 51541627 is a prime.

It is a super-2 number, since 2×51541691² = 5313091822278962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51541601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25770845 + 25770846.

It is an arithmetic number, because the mean of its divisors is an integer number (25770846).

Almost surely, 2^51541691 is an apocalyptic number.

51541691 is a deficient number, since it is larger than the sum of its proper divisors (1).

51541691 is an equidigital number, since it uses as much as digits as its factorization.

51541691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 51541691 is about 7179.2542091780. The cubic root of 51541691 is about 372.1513119180.

The spelling of 51541691 in words is "fifty-one million, five hundred forty-one thousand, six hundred ninety-one".