51453257 has 2 divisors, whose sum is σ = 51453258. Its totient is φ = 51453256.

The previous prime is 51453239. The next prime is 51453313. The reversal of 51453257 is 75235415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40589641 + 10863616 = 6371^2 + 3296^2 .

It is a cyclic number.

It is not a de Polignac number, because 51453257 - 2²⁴ = 34676041 is a prime.

It is not a weakly prime, because it can be changed into another prime (51453217) 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, 25726628 + 25726629.

It is an arithmetic number, because the mean of its divisors is an integer number (25726629).

Almost surely, 2^51453257 is an apocalyptic number.

It is an amenable number.

51453257 is a deficient number, since it is larger than the sum of its proper divisors (1).

51453257 is an equidigital number, since it uses as much as digits as its factorization.

51453257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 32.

The square root of 51453257 is about 7173.0925687600. The cubic root of 51453257 is about 371.9383472999.

The spelling of 51453257 in words is "fifty-one million, four hundred fifty-three thousand, two hundred fifty-seven".