51223379 has 2 divisors, whose sum is σ = 51223380. Its totient is φ = 51223378.

The previous prime is 51223357. The next prime is 51223423. The reversal of 51223379 is 97332215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51223379 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51225379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25611689 + 25611690.

It is an arithmetic number, because the mean of its divisors is an integer number (25611690).

Almost surely, 2^51223379 is an apocalyptic number.

51223379 is a deficient number, since it is larger than the sum of its proper divisors (1).

51223379 is an equidigital number, since it uses as much as digits as its factorization.

51223379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 32.

The square root of 51223379 is about 7157.0509988402. The cubic root of 51223379 is about 371.3836166852.

The spelling of 51223379 in words is "fifty-one million, two hundred twenty-three thousand, three hundred seventy-nine".