51449953 has 2 divisors, whose sum is σ = 51449954. Its totient is φ = 51449952.

The previous prime is 51449941. The next prime is 51449971. The reversal of 51449953 is 35994415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26967249 + 24482704 = 5193^2 + 4948^2 .

It is a cyclic number.

It is not a de Polignac number, because 51449953 - 2⁹ = 51449441 is a prime.

It is not a weakly prime, because it can be changed into another prime (51449933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25724976 + 25724977.

It is an arithmetic number, because the mean of its divisors is an integer number (25724977).

Almost surely, 2^51449953 is an apocalyptic number.

It is an amenable number.

51449953 is a deficient number, since it is larger than the sum of its proper divisors (1).

51449953 is an equidigital number, since it uses as much as digits as its factorization.

51449953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 51449953 is about 7172.8622599350. The cubic root of 51449953 is about 371.9303859600.

The spelling of 51449953 in words is "fifty-one million, four hundred forty-nine thousand, nine hundred fifty-three".