51642419 has 2 divisors, whose sum is σ = 51642420. Its totient is φ = 51642418.

The previous prime is 51642407. The next prime is 51642421. The reversal of 51642419 is 91424615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51642419 - 2⁸ = 51642163 is a prime.

It is a super-2 number, since 2×51642419² = 5333878880343122, which contains 22 as substring.

Together with 51642421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51642119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25821209 + 25821210.

It is an arithmetic number, because the mean of its divisors is an integer number (25821210).

Almost surely, 2^51642419 is an apocalyptic number.

51642419 is a deficient number, since it is larger than the sum of its proper divisors (1).

51642419 is an equidigital number, since it uses as much as digits as its factorization.

51642419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 51642419 is about 7186.2659984167. The cubic root of 51642419 is about 372.3935861069.

The spelling of 51642419 in words is "fifty-one million, six hundred forty-two thousand, four hundred nineteen".