51449197 has 2 divisors, whose sum is σ = 51449198. Its totient is φ = 51449196.

The previous prime is 51449171. The next prime is 51449213. The reversal of 51449197 is 79194415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49196196 + 2253001 = 7014^2 + 1501^2 .

It is a cyclic number.

It is not a de Polignac number, because 51449197 - 2¹⁵ = 51416429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51440197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25724598 + 25724599.

It is an arithmetic number, because the mean of its divisors is an integer number (25724599).

Almost surely, 2^51449197 is an apocalyptic number.

It is an amenable number.

51449197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51449197 is an equidigital number, since it uses as much as digits as its factorization.

51449197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 51449197 is about 7172.8095611134. The cubic root of 51449197 is about 371.9285642496.

It can be divided in two parts, 5144 and 9197, that added together give a palindrome (14341).

The spelling of 51449197 in words is "fifty-one million, four hundred forty-nine thousand, one hundred ninety-seven".