51083491 has 2 divisors, whose sum is σ = 51083492. Its totient is φ = 51083490.

The previous prime is 51083447. The next prime is 51083497. The reversal of 51083491 is 19438015.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51083491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51083497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25541745 + 25541746.

It is an arithmetic number, because the mean of its divisors is an integer number (25541746).

Almost surely, 2^51083491 is an apocalyptic number.

51083491 is a deficient number, since it is larger than the sum of its proper divisors (1).

51083491 is an equidigital number, since it uses as much as digits as its factorization.

51083491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 51083491 is about 7147.2715773224. The cubic root of 51083491 is about 371.0452329434.

The spelling of 51083491 in words is "fifty-one million, eighty-three thousand, four hundred ninety-one".