51341491 has 2 divisors, whose sum is σ = 51341492. Its totient is φ = 51341490.

The previous prime is 51341453. The next prime is 51341501. The reversal of 51341491 is 19414315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51341491 - 2¹¹ = 51339443 is a prime.

It is not a weakly prime, because it can be changed into another prime (51341291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25670745 + 25670746.

It is an arithmetic number, because the mean of its divisors is an integer number (25670746).

Almost surely, 2^51341491 is an apocalyptic number.

51341491 is a deficient number, since it is larger than the sum of its proper divisors (1).

51341491 is an equidigital number, since it uses as much as digits as its factorization.

51341491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 51341491 is about 7165.2976909546. The cubic root of 51341491 is about 371.6688457535.

The spelling of 51341491 in words is "fifty-one million, three hundred forty-one thousand, four hundred ninety-one".