51449477 has 2 divisors, whose sum is σ = 51449478. Its totient is φ = 51449476.

The previous prime is 51449467. The next prime is 51449507. The reversal of 51449477 is 77494415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34093921 + 17355556 = 5839^2 + 4166^2 .

It is a cyclic number.

It is not a de Polignac number, because 51449477 - 2¹⁴ = 51433093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51449407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25724738 + 25724739.

It is an arithmetic number, because the mean of its divisors is an integer number (25724739).

Almost surely, 2^51449477 is an apocalyptic number.

It is an amenable number.

51449477 is a deficient number, since it is larger than the sum of its proper divisors (1).

51449477 is an equidigital number, since it uses as much as digits as its factorization.

51449477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 51449477 is about 7172.8290792406. The cubic root of 51449477 is about 371.9292389592.

The spelling of 51449477 in words is "fifty-one million, four hundred forty-nine thousand, four hundred seventy-seven".