51415379 has 2 divisors, whose sum is σ = 51415380. Its totient is φ = 51415378.

The previous prime is 51415369. The next prime is 51415447. The reversal of 51415379 is 97351415.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51415379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51415369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25707689 + 25707690.

It is an arithmetic number, because the mean of its divisors is an integer number (25707690).

Almost surely, 2^51415379 is an apocalyptic number.

51415379 is a deficient number, since it is larger than the sum of its proper divisors (1).

51415379 is an equidigital number, since it uses as much as digits as its factorization.

51415379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 35.

The square root of 51415379 is about 7170.4517988757. The cubic root of 51415379 is about 371.8470557728.

The spelling of 51415379 in words is "fifty-one million, four hundred fifteen thousand, three hundred seventy-nine".