51545419 has 2 divisors, whose sum is σ = 51545420. Its totient is φ = 51545418.

The previous prime is 51545399. The next prime is 51545437. The reversal of 51545419 is 91454515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51545419 - 2⁵ = 51545387 is a prime.

It is a super-2 number, since 2×51545419² = 5313860439771122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51545449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25772709 + 25772710.

It is an arithmetic number, because the mean of its divisors is an integer number (25772710).

Almost surely, 2^51545419 is an apocalyptic number.

51545419 is a deficient number, since it is larger than the sum of its proper divisors (1).

51545419 is an equidigital number, since it uses as much as digits as its factorization.

51545419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 34.

The square root of 51545419 is about 7179.5138414798. The cubic root of 51545419 is about 372.1602842445.

The spelling of 51545419 in words is "fifty-one million, five hundred forty-five thousand, four hundred nineteen".