51872449 has 2 divisors, whose sum is σ = 51872450. Its totient is φ = 51872448.

The previous prime is 51872411. The next prime is 51872459. The reversal of 51872449 is 94427815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29376400 + 22496049 = 5420^2 + 4743^2 .

It is a cyclic number.

It is not a de Polignac number, because 51872449 - 2¹³ = 51864257 is a prime.

It is not a weakly prime, because it can be changed into another prime (51872459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25936224 + 25936225.

It is an arithmetic number, because the mean of its divisors is an integer number (25936225).

Almost surely, 2^51872449 is an apocalyptic number.

It is an amenable number.

51872449 is a deficient number, since it is larger than the sum of its proper divisors (1).

51872449 is an equidigital number, since it uses as much as digits as its factorization.

51872449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 51872449 is about 7202.2530502614. The cubic root of 51872449 is about 372.9456827805.

The spelling of 51872449 in words is "fifty-one million, eight hundred seventy-two thousand, four hundred forty-nine".