51207619 has 2 divisors, whose sum is σ = 51207620. Its totient is φ = 51207618.

The previous prime is 51207617. The next prime is 51207623. The reversal of 51207619 is 91670215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51207619 - 2¹ = 51207617 is a prime.

It is a super-2 number, since 2×51207619² = 5244440487298322, which contains 22 as substring.

Together with 51207617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51207613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25603809 + 25603810.

It is an arithmetic number, because the mean of its divisors is an integer number (25603810).

Almost surely, 2^51207619 is an apocalyptic number.

51207619 is a deficient number, since it is larger than the sum of its proper divisors (1).

51207619 is an equidigital number, since it uses as much as digits as its factorization.

51207619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 51207619 is about 7155.9499020046. The cubic root of 51207619 is about 371.3455246637.

The spelling of 51207619 in words is "fifty-one million, two hundred seven thousand, six hundred nineteen".